pyslha.py

Mon, 29 Apr 2013 14:55:44 +0200

author
Andy Buckley <andy@insectnation.org>
date
Mon, 29 Apr 2013 14:55:44 +0200
changeset 212
3a6db3deedef
parent 211
91f559c01cf7
child 213
11aef4bd7802
permissions
-rw-r--r--

Extra thoughts about comment implementation

andy@1 1 #! /usr/bin/env python
andy@1 2
andy@8 3 """\
andy@208 4 A simple but flexible handler of the SUSY Les Houches Accord (SLHA) data format.
andy@25 5
andy@52 6 pyslha is a parser/writer module for particle physics SUSY Les Houches Accord
andy@52 7 (SLHA) supersymmetric spectrum/decay files, and a collection of scripts which
andy@52 8 use the interface, e.g. for conversion to and from the legacy ISAWIG format, or
andy@52 9 to plot the mass spectrum and decay chains.
andy@52 10
andy@192 11 The current release supports SLHA version 1, and as far as I'm aware is also
andy@145 12 fully compatible with SLHA2: the block structures are read and accessed
andy@192 13 generically. If you have any problems, please provide an example input file and
andy@208 14 I'll happily investigate.
andy@52 15
andy@131 16 The plotting script provides output in PDF, EPS and PNG via LaTeX and the TikZ
andy@131 17 graphics package, and as LaTeX/TikZ source for direct embedding into documents or
andy@131 18 user-tweaking of the generated output.
andy@64 19
andy@208 20 Users of version 1.x should note that the interface has changed a little in
andy@208 21 version 2.0.0 and onward, in particular in the interface of the Block objects,
andy@208 22 which are now more dict-like: entries can be added and accessed via the usual
andy@208 23 square-brackets indexing operators, including for multiple indices as is common
andy@208 24 for mixing matrices e.g. NMIX[1,2] as opposed to the old NMIX.entries[1][2]
andy@208 25 way. This does break backward compatibility but is a big improvement both for
andy@208 26 internal code sanity and usability. The Block interface also now supplies
andy@208 27 dict-like has_key(), keys(), and items() methods, as well as more specialist
andy@208 28 value(), set_value() and is_single_valued() methods for improved access to ALPHA
andy@208 29 and any other unindexed blocks.
andy@208 30
andy@208 31 Please cite PySLHA via the URL http://insectnation.org/projects/pyslha if it is
andy@208 32 useful to you in the production of an academic paper. A PySLHA publication will
andy@208 33 be provided at some point... watch this space!
andy@208 34
andy@208 35
andy@52 36 TODOs:
andy@192 37
andy@208 38 For 2.0.0:
andy@212 39 * Preserve comments from read -> write (needs full-line/inline comment
andy@212 40 separation?). Can use separate comment dicts in Block and Decay, and
andy@212 41 attach a multiline .comment attr to the returned/written dicts.
andy@198 42
andy@208 43 For 2.1.0:
andy@211 44 * Output column alignment cosmetics
andy@192 45
andy@208 46 Later/maybe:
andy@208 47 * Identify HERWIG decay matrix element to use in ISAWIG
andy@208 48 * Handle RPV SUSY in ISAWIG
andy@8 49 """
andy@8 50
andy@8 51 __author__ = "Andy Buckley <andy.buckley@cern.ch"
andy@197 52 __version__ = "2.0.0a0"
andy@8 53
andy@1 54
andy@189 55 def _mkdict():
andy@189 56 """Try to return an empty ordered dict, but fall back to normal dict if necessary"""
andy@189 57 try:
andy@189 58 from collections import OrderedDict
andy@189 59 return OrderedDict()
andy@189 60 except:
andy@189 61 try:
andy@189 62 from ordereddict import OrderedDict
andy@189 63 return OrderedDict()
andy@189 64 except:
andy@189 65 return dict()
andy@189 66
andy@4 67 def _autotype(var):
andy@30 68 """Automatically convert strings to numerical types if possible."""
andy@30 69 if type(var) is not str:
andy@4 70 return var
andy@36 71 if var.isdigit() or (var.startswith("-") and var[1:].isdigit()):
andy@4 72 return int(var)
andy@4 73 try:
andy@4 74 f = float(var)
andy@4 75 return f
andy@4 76 except ValueError:
andy@4 77 return var
andy@4 78
andy@147 79 def _autostr(var, precision=8):
andy@192 80 """Automatically format numerical types as the right sort of string."""
andy@30 81 if type(var) is float:
andy@147 82 return ("%." + str(precision) + "e") % var
andy@30 83 return str(var)
andy@30 84
andy@30 85
andy@193 86 class AccessError(Exception):
andy@193 87 "Exception object to be raised when a SLHA block is accessed in an invalid way"
andy@193 88 def __init__(self, errmsg):
andy@193 89 self.msg = errmsg
andy@193 90 def __str__(self):
andy@193 91 return self.msg
andy@193 92
andy@166 93 class ParseError(Exception):
andy@166 94 "Exception object to be raised when a spectrum file/string is malformed"
andy@166 95 def __init__(self, errmsg):
andy@166 96 self.msg = errmsg
andy@168 97 def __str__(self):
andy@166 98 return self.msg
andy@166 99
andy@166 100
andy@4 101
andy@12 102 class Block(object):
andy@8 103 """
andy@203 104 Object representation of any BLOCK elements read from an SLHA file.
andy@203 105
andy@203 106 Blocks have a name, may have an associated Q value, and contain a collection
andy@203 107 of data entries, each indexed by one or more keys. Entries in the dictionary
andy@203 108 are stored as numeric types (int or float) when a cast from the string in
andy@203 109 the file has been possible.
andy@203 110
andy@203 111 Block is closely related to a Python dict (and, in fact, is implemented via
andy@203 112 an OrderedDict when possible). The preferred methods of entry access use the
andy@203 113 dict-like [] operator for getting and setting, and the keys() and items()
andy@203 114 methods for iteration. Purely iterating over the object behaves like keys(),
andy@203 115 as for an ordinary dict.
andy@203 116
andy@203 117 Multiple indices are possible, especially for entries in mixing matrix
andy@203 118 blocks. These are now implemented in the natural way, e.g. for access to the
andy@203 119 (1,2) element of a mxing matrix block, use bmix[1,2] = 0.123 and print
andy@203 120 bmix[1,2]. The value() and set_value() functions behave similarly.
andy@203 121
andy@203 122 It is possible, although not usual, to store unindexed values in a
andy@203 123 block. This is only supported when that entry is the only one in the block,
andy@203 124 and it is stored in the normal fashion but with None as the lookup key. The
andy@203 125 value() method may be used without a key argument to retrieve this value, if
andy@203 126 the is_single_valued() method returns True, and similarly the set_value()
andy@203 127 method may be used to set it if only one argument is supplied and the object
andy@203 128 is compatible.
andy@8 129 """
andy@204 130 def __init__(self, name, q=None, entries=None):
andy@1 131 self.name = name
andy@189 132 self.entries = _mkdict()
andy@204 133 if entries is not None:
andy@204 134 self.entries.update(entries)
andy@5 135 self.q = _autotype(q)
andy@1 136
andy@1 137 def add_entry(self, entry):
andy@203 138 """Add an entry to the block from an iterable (i.e. list or tuple) or
andy@203 139 whitespace-separated string.
andy@203 140
andy@196 141 Indexing will be determined automatically such that there is always a
andy@196 142 single-element value: multi-value or None indices may be constructed
andy@196 143 implicitly.
andy@196 144 """
andy@203 145 ## If the argument is a single string, split it and proceed
andy@203 146 if type(entry) is str:
andy@203 147 entry = entry.split()
andy@203 148 ## Check that the arg is an iterable
andy@196 149 if not hasattr(entry, "__iter__"):
andy@196 150 raise AccessError("Block entries must be iterable")
andy@203 151 ## Auto-convert the types in the list
andy@192 152 entry = map(_autotype, entry)
andy@203 153 ## Add the entry to the map, with appropriate indices
andy@196 154 if len(entry) == 1:
andy@196 155 self.entries[None] = entry[0]
andy@192 156 elif len(entry) == 2:
andy@192 157 self.entries[entry[0]] = entry[1]
andy@192 158 else:
andy@192 159 self.entries[tuple(entry[:-1])] = entry[-1]
andy@192 160
andy@196 161 def is_single_valued(self):
andy@196 162 """Return true if there is only one entry, and it has no index: the
andy@196 163 'value()' attribute may be used in that case without an argument."""
andy@199 164 return len(self.entries) == 1 and self.entries.keys()[0] is None
andy@196 165
andy@196 166 def value(self, key=None):
andy@196 167 """Get a value from the block with the supplied key.
andy@196 168
andy@196 169 If no key is given, then the block must contain only one non-indexed
andy@196 170 value otherwise an AccessError exception will be raised.\
andy@196 171 """
andy@196 172 if key == None and not self.is_single_valued():
andy@196 173 raise AccessError("Tried to access unique value of multi-value block")
andy@196 174 return self.entries[key]
andy@196 175
andy@203 176 def set_value(self, *args):
andy@203 177 """Set a value in the block with supplied key, val args (or just val for
andy@203 178 an unindexed block).
andy@203 179
andy@203 180 If no key is given, then the block must contain only one non-indexed
andy@203 181 value otherwise an AccessError exception will be raised.\
andy@203 182 """
andy@203 183 if len(args) == 0:
andy@203 184 raise AccessError("set_value() called without arguments")
andy@203 185 elif len(args) == 1:
andy@203 186 if len(self.entries) > 0 and not self.is_single_valued():
andy@203 187 raise AccessError("Tried to set a unique value on a multi-value block")
andy@203 188 self.entries[None] = args[0]
andy@203 189 else:
andy@203 190 self.entries[tuple(args[:-1])] = args[-1]
andy@203 191
andy@205 192 def has_key(self, key):
andy@205 193 """Does the block have the given key?"""
andy@205 194 return self.entries.has_key(key)
andy@205 195
andy@200 196 def keys(self):
andy@200 197 """Access the block item keys."""
andy@201 198 return self.entries.keys()
andy@200 199
andy@195 200 def items(self, key=None):
andy@196 201 """Access the block items as (key,value) tuples.
andy@196 202
andy@196 203 Note: The Python 3 dict attribute 'items()' is used rather than the
andy@196 204 'old' Python 2 'iteritems()' name for forward-looking compatibility.\
andy@196 205 """
andy@193 206 return self.entries.iteritems()
andy@193 207
andy@193 208 def __len__(self):
andy@193 209 return len(self.entries)
andy@193 210
andy@196 211 def __iter(self):
andy@196 212 return self.entries.__iter__()
andy@196 213
andy@192 214 def __getitem__(self, key):
andy@192 215 return self.entries[key]
andy@1 216
andy@201 217 def __setitem__(self, key, value):
andy@201 218 self.entries[key] = value
andy@201 219
andy@1 220 def __cmp__(self, other):
andy@196 221 return cmp(self.name, other.name) and cmp(self.entries, other.entries)
andy@1 222
andy@193 223 def __repr__(self):
andy@1 224 s = self.name
andy@5 225 if self.q is not None:
andy@5 226 s += " (Q=%s)" % self.q
andy@196 227 def _format_kv(k, v):
andy@196 228 if type(k) is not tuple:
andy@196 229 s = "%r" % k
andy@196 230 else:
andy@196 231 s = ",".join("%r" % subindex for subindex in k)
andy@196 232 s += " : %r" % v
andy@196 233 return s
andy@196 234 s += " { " + "; ".join(_format_kv(k, v) for k, v in self.items()) + " }"
andy@1 235 return s
andy@1 236
andy@1 237
andy@12 238 class Decay(object):
andy@8 239 """
andy@8 240 Object representing a decay entry on a particle decribed by the SLHA file.
andy@8 241 'Decay' objects are not a direct representation of a DECAY block in an SLHA
andy@8 242 file... that role, somewhat confusingly, is taken by the Particle class.
andy@8 243
andy@8 244 Decay objects have three properties: a branching ratio, br, an nda number
andy@12 245 (number of daughters == len(ids)), and a tuple of PDG PIDs to which the
andy@12 246 decay occurs. The PDG ID of the particle whose decay this represents may
andy@12 247 also be stored, but this is normally known via the Particle in which the
andy@12 248 decay is stored.
andy@8 249 """
andy@8 250 def __init__(self, br, nda, ids, parentid=None):
andy@8 251 self.parentid = parentid
andy@6 252 self.br = br
andy@6 253 self.nda = nda
andy@6 254 self.ids = ids
andy@29 255 assert(self.nda == len(self.ids))
andy@6 256
andy@6 257 def __cmp__(self, other):
andy@31 258 return cmp(other.br, self.br)
andy@6 259
andy@6 260 def __str__(self):
andy@147 261 return "%.8e %s" % (self.br, self.ids)
andy@6 262
andy@123 263 def __repr__(self):
andy@123 264 return self.__str__()
andy@123 265
andy@6 266
andy@12 267 class Particle(object):
andy@8 268 """
andy@8 269 Representation of a single, specific particle, decay block from an SLHA
andy@8 270 file. These objects are not themselves called 'Decay', since that concept
andy@8 271 applies more naturally to the various decays found inside this
andy@8 272 object. Particle classes store the PDG ID (pid) of the particle being
andy@8 273 represented, and optionally the mass (mass) and total decay width
andy@8 274 (totalwidth) of that particle in the SLHA scenario. Masses may also be found
andy@8 275 via the MASS block, from which the Particle.mass property is filled, if at
andy@8 276 all. They also store a list of Decay objects (decays) which are probably the
andy@8 277 item of most interest.
andy@8 278 """
andy@6 279 def __init__(self, pid, totalwidth=None, mass=None):
andy@6 280 self.pid = pid
andy@6 281 self.totalwidth = totalwidth
andy@6 282 self.mass = mass
andy@6 283 self.decays = []
andy@6 284
andy@6 285 def add_decay(self, br, nda, ids):
andy@6 286 self.decays.append(Decay(br, nda, ids))
andy@6 287 self.decays.sort()
andy@6 288
andy@6 289 def __cmp__(self, other):
andy@6 290 if abs(self.pid) == abs(other.pid):
andy@31 291 return cmp(self.pid, other.pid)
andy@31 292 return cmp(abs(self.pid), abs(other.pid))
andy@6 293
andy@6 294 def __str__(self):
andy@6 295 s = str(self.pid)
andy@7 296 if self.mass is not None:
andy@147 297 s += " : mass = %.8e GeV" % self.mass
andy@6 298 if self.totalwidth is not None:
andy@147 299 s += " : total width = %.8e GeV" % self.totalwidth
andy@6 300 for d in self.decays:
andy@12 301 if d.br > 0.0:
andy@12 302 s += "\n %s" % d
andy@6 303 return s
andy@1 304
andy@123 305 def __repr__(self):
andy@123 306 return self.__str__()
andy@123 307
andy@123 308
andy@1 309
andy@21 310
andy@21 311
andy@31 312 def readSLHA(spcstr, ignorenobr=False):
andy@21 313 """
andy@31 314 Read an SLHA definition from a string, returning dictionaries of blocks and
andy@31 315 decays.
andy@31 316
andy@31 317 If the ignorenobr parameter is True, do not store decay entries with a
andy@31 318 branching ratio of zero.
andy@21 319 """
andy@189 320 blocks = _mkdict()
andy@189 321 decays = _mkdict()
andy@21 322 #
andy@34 323 import re
andy@21 324 currentblock = None
andy@21 325 currentdecay = None
andy@21 326 for line in spcstr.splitlines():
andy@21 327 ## Handle (ignore) comment lines
andy@192 328 # TODO: Store block/entry comments
andy@21 329 if line.startswith("#"):
andy@21 330 continue
andy@21 331 if "#" in line:
andy@21 332 line = line[:line.index("#")]
andy@21 333
andy@21 334 ## Handle BLOCK/DECAY start lines
andy@21 335 if line.upper().startswith("BLOCK"):
andy@47 336 #print line
andy@141 337 match = re.match(r"BLOCK\s+(\w+)(\s+Q\s*=\s*.+)?", line.upper())
andy@21 338 if not match:
andy@8 339 continue
andy@21 340 blockname = match.group(1)
andy@21 341 qstr = match.group(2)
andy@21 342 if qstr is not None:
andy@141 343 qstr = qstr[qstr.find("=")+1:].strip()
andy@21 344 currentblock = blockname
andy@21 345 currentdecay = None
andy@21 346 blocks[blockname] = Block(blockname, q=qstr)
andy@21 347 elif line.upper().startswith("DECAY"):
andy@185 348 match = re.match(r"DECAY\s+(-?\d+)\s+([\d\.E+-]+|NAN).*", line.upper())
andy@21 349 if not match:
andy@21 350 continue
andy@21 351 pdgid = int(match.group(1))
andy@185 352 width = float(match.group(2)) if match.group(2) != "NAN" else None
andy@21 353 currentblock = "DECAY"
andy@21 354 currentdecay = pdgid
andy@21 355 decays[pdgid] = Particle(pdgid, width)
andy@21 356 else:
andy@21 357 ## In-block line
andy@21 358 if currentblock is not None:
andy@21 359 items = line.split()
andy@21 360 if len(items) < 1:
andy@6 361 continue
andy@21 362 if currentblock != "DECAY":
andy@200 363 blocks[currentblock].add_entry(items)
andy@21 364 else:
andy@185 365 br = float(items[0]) if items[0].upper() != "NAN" else None
andy@21 366 nda = int(items[1])
andy@21 367 ids = map(int, items[2:])
andy@185 368 if br > 0.0 or not ignorenobr: # br == None is < 0
andy@31 369 decays[currentdecay].add_decay(br, nda, ids)
andy@1 370
andy@8 371 ## Try to populate Particle masses from the MASS block
andy@47 372 # print blocks.keys()
andy@47 373 try:
andy@201 374 for pid in blocks["MASS"].keys():
andy@47 375 if decays.has_key(pid):
andy@201 376 decays[pid].mass = blocks["MASS"][pid]
andy@47 377 except:
andy@166 378 raise ParseError("No MASS block found: cannot populate particle masses")
andy@8 379
andy@1 380 return blocks, decays
andy@1 381
andy@1 382
andy@124 383
andy@210 384 def writeSLHABlocks(blocks, precision=8):
andy@210 385 """Return an SLHA definition as a string, from the supplied blocks dict."""
andy@192 386 # TODO: Pay attention to space-padding and minus signs for column alignment
andy@211 387 sep = 3 * " "
andy@192 388 blockstrs = []
andy@189 389 for bname, b in blocks.iteritems():
andy@124 390 namestr = b.name
andy@124 391 if b.q is not None:
andy@211 392 namestr += " Q= " + _autostr(float(b.q), precision)
andy@192 393 blockstr = "BLOCK %s\n" % namestr
andy@192 394 entrystrs = []
andy@201 395 for k, v in b.items():
andy@192 396 entrystr = ""
andy@192 397 if type(k) == tuple:
andy@211 398 entrystr += sep.join(_autostr(i, precision) for i in k)
andy@194 399 elif k is not None:
andy@211 400 entrystr += _autostr(k, precision)
andy@211 401 entrystr += sep + _autostr(v, precision)
andy@192 402 entrystrs.append(entrystr)
andy@192 403 blockstr += "\n".join(entrystrs)
andy@192 404 blockstrs.append(blockstr)
andy@210 405 return "\n\n".join(blockstrs)
andy@210 406
andy@210 407
andy@210 408
andy@210 409 def writeSLHADecays(decays, ignorenobr=False, precision=8):
andy@210 410 """Return an SLHA decay definition as a string, from the supplied decays dict."""
andy@211 411 sep = 3 * " "
andy@210 412 blockstrs = []
andy@189 413 for pid, particle in decays.iteritems():
andy@211 414 blockstr = ("DECAY %d " % particle.pid) + _autostr(particle.totalwidth or -1, precision) + "\n"
andy@192 415 decaystrs = []
andy@189 416 for d in particle.decays:
andy@124 417 if d.br > 0.0 or not ignorenobr:
andy@192 418 products_str = sep.join(map(str, d.ids))
andy@211 419 decaystr = sep + _autostr(d.br, precision) + sep + str(len(d.ids)) + sep + products_str
andy@192 420 decaystrs.append(decaystr)
andy@192 421 blockstr += "\n".join(decaystrs)
andy@192 422 blockstrs.append(blockstr)
andy@192 423 return "\n\n".join(blockstrs)
andy@124 424
andy@124 425
andy@124 426
andy@210 427 def writeSLHA(blocks, decays, ignorenobr=False, precision=8):
andy@210 428 """Return an SLHA definition as a string, from the supplied blocks and decays dicts."""
andy@210 429 return writeSLHABlocks(blocks, precision) + "\n\n" + writeSLHADecays(decays, ignorenobr, precision)
andy@210 430
andy@210 431
andy@210 432
andy@124 433 ###############################################################################
andy@161 434 ## PDG <-> HERWIG particle ID code translations for ISAWIG handling
andy@124 435
andy@124 436 ## Static array of HERWIG IDHW codes mapped to PDG MC ID codes, based on
andy@124 437 ## http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/susycodes.html
andy@124 438 ## + the IDPDG array and section 4.13 of the HERWIG manual.
andy@124 439 _HERWIGID2PDGID = {}
andy@124 440 _HERWIGID2PDGID[7] = -1
andy@124 441 _HERWIGID2PDGID[8] = -2
andy@124 442 _HERWIGID2PDGID[9] = -3
andy@124 443 _HERWIGID2PDGID[10] = -4
andy@124 444 _HERWIGID2PDGID[11] = -5
andy@124 445 _HERWIGID2PDGID[12] = -6
andy@124 446 _HERWIGID2PDGID[13] = 21
andy@124 447 _HERWIGID2PDGID[59] = 22
andy@124 448 _HERWIGID2PDGID[121] = 11
andy@124 449 _HERWIGID2PDGID[122] = 12
andy@124 450 _HERWIGID2PDGID[123] = 13
andy@124 451 _HERWIGID2PDGID[124] = 14
andy@124 452 _HERWIGID2PDGID[125] = 15
andy@124 453 _HERWIGID2PDGID[126] = 16
andy@124 454 _HERWIGID2PDGID[127] = -11
andy@124 455 _HERWIGID2PDGID[128] = -12
andy@124 456 _HERWIGID2PDGID[129] = -13
andy@124 457 _HERWIGID2PDGID[130] = -14
andy@124 458 _HERWIGID2PDGID[131] = -15
andy@124 459 _HERWIGID2PDGID[132] = -16
andy@139 460 _HERWIGID2PDGID[198] = 24 # W+
andy@139 461 _HERWIGID2PDGID[199] = -24 # W-
andy@139 462 _HERWIGID2PDGID[200] = 23 # Z0
andy@139 463 _HERWIGID2PDGID[201] = 25 ## SM HIGGS
andy@124 464 _HERWIGID2PDGID[203] = 25 ## HIGGSL0 (== PDG standard in this direction)
andy@124 465 _HERWIGID2PDGID[204] = 35 ## HIGGSH0
andy@124 466 _HERWIGID2PDGID[205] = 36 ## HIGGSA0
andy@124 467 _HERWIGID2PDGID[206] = 37 ## HIGGS+
andy@124 468 _HERWIGID2PDGID[207] = -37 ## HIGGS-
andy@124 469 _HERWIGID2PDGID[401] = 1000001 ## SSDLBR
andy@124 470 _HERWIGID2PDGID[407] = -1000001 ## SSDLBR
andy@124 471 _HERWIGID2PDGID[402] = 1000002 ## SSULBR
andy@124 472 _HERWIGID2PDGID[408] = -1000002 ## SSUL
andy@124 473 _HERWIGID2PDGID[403] = 1000003 ## SSSLBR
andy@124 474 _HERWIGID2PDGID[409] = -1000003 ## SSSL
andy@124 475 _HERWIGID2PDGID[404] = 1000004 ## SSCLBR
andy@124 476 _HERWIGID2PDGID[410] = -1000004 ## SSCL
andy@124 477 _HERWIGID2PDGID[405] = 1000005 ## SSB1BR
andy@124 478 _HERWIGID2PDGID[411] = -1000005 ## SSB1
andy@124 479 _HERWIGID2PDGID[406] = 1000006 ## SST1BR
andy@124 480 _HERWIGID2PDGID[412] = -1000006 ## SST1
andy@124 481 _HERWIGID2PDGID[413] = 2000001 ## SSDR
andy@124 482 _HERWIGID2PDGID[419] = -2000001 ## SSDRBR
andy@124 483 _HERWIGID2PDGID[414] = 2000002 ## SSUR
andy@124 484 _HERWIGID2PDGID[420] = -2000002 ## SSURBR
andy@124 485 _HERWIGID2PDGID[415] = 2000003 ## SSSR
andy@124 486 _HERWIGID2PDGID[421] = -2000003 ## SSSRBR
andy@124 487 _HERWIGID2PDGID[416] = 2000004 ## SSCR
andy@124 488 _HERWIGID2PDGID[422] = -2000004 ## SSCRBR
andy@124 489 _HERWIGID2PDGID[417] = 2000005 ## SSB2
andy@124 490 _HERWIGID2PDGID[423] = -2000005 ## SSB2BR
andy@124 491 _HERWIGID2PDGID[418] = 2000006 ## SST2
andy@124 492 _HERWIGID2PDGID[424] = -2000006 ## SST2BR
andy@124 493 _HERWIGID2PDGID[425] = 1000011 ## SSEL-
andy@124 494 _HERWIGID2PDGID[431] = -1000011 ## SSEL+
andy@124 495 _HERWIGID2PDGID[426] = 1000012 ## SSNUEL
andy@124 496 _HERWIGID2PDGID[432] = -1000012 ## SSNUELBR
andy@124 497 _HERWIGID2PDGID[427] = 1000013 ## SSMUL-
andy@124 498 _HERWIGID2PDGID[433] = -1000013 ## SSMUL+
andy@124 499 _HERWIGID2PDGID[428] = 1000014 ## SSNUMUL
andy@124 500 _HERWIGID2PDGID[434] = -1000014 ## SSNUMLBR
andy@124 501 _HERWIGID2PDGID[429] = 1000015 ## SSTAU1-
andy@124 502 _HERWIGID2PDGID[435] = -1000015 ## SSTAU1+
andy@124 503 _HERWIGID2PDGID[430] = 1000016 ## SSNUTL
andy@124 504 _HERWIGID2PDGID[436] = -1000016 ## SSNUTLBR
andy@124 505 _HERWIGID2PDGID[437] = 2000011 ## SSEL-
andy@124 506 _HERWIGID2PDGID[443] = -2000011 ## SSEL+
andy@124 507 _HERWIGID2PDGID[438] = 2000012 ## SSNUEL
andy@124 508 _HERWIGID2PDGID[444] = -2000012 ## SSNUELBR
andy@124 509 _HERWIGID2PDGID[439] = 2000013 ## SSMUL-
andy@124 510 _HERWIGID2PDGID[445] = -2000013 ## SSMUL+
andy@124 511 _HERWIGID2PDGID[440] = 2000014 ## SSNUMUL
andy@124 512 _HERWIGID2PDGID[446] = -2000014 ## SSNUMLBR
andy@124 513 _HERWIGID2PDGID[441] = 2000015 ## SSTAU1-
andy@124 514 _HERWIGID2PDGID[447] = -2000015 ## SSTAU1+
andy@124 515 _HERWIGID2PDGID[442] = 2000016 ## SSNUTL
andy@124 516 _HERWIGID2PDGID[448] = -2000016 ## SSNUTLBR
andy@124 517 _HERWIGID2PDGID[449] = 1000021 ## GLUINO
andy@124 518 _HERWIGID2PDGID[450] = 1000022 ## NTLINO1
andy@124 519 _HERWIGID2PDGID[451] = 1000023 ## NTLINO2
andy@124 520 _HERWIGID2PDGID[452] = 1000025 ## NTLINO3
andy@124 521 _HERWIGID2PDGID[453] = 1000035 ## NTLINO4
andy@124 522 _HERWIGID2PDGID[454] = 1000024 ## CHGINO1+
andy@124 523 _HERWIGID2PDGID[456] = -1000024 ## CHGINO1-
andy@124 524 _HERWIGID2PDGID[455] = 1000037 ## CHGINO2+
andy@124 525 _HERWIGID2PDGID[457] = -1000037 ## CHGINO2-
andy@124 526 _HERWIGID2PDGID[458] = 1000039 ## GRAVTINO
andy@124 527
andy@124 528 def herwigid2pdgid(hwid):
andy@124 529 """
andy@124 530 Convert a particle ID code in the HERWIG internal IDHW format (as used by
andy@124 531 ISAWIG) into its equivalent in the standard PDG ID code definition.
andy@124 532 """
andy@124 533 return _HERWIGID2PDGID.get(hwid, hwid)
andy@124 534
andy@120 535
andy@124 536 ## PDG MC ID codes mapped to HERWIG IDHW codes, based on
andy@124 537 ## http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/susycodes.html
andy@124 538 ## + the IDPDG array and section 4.13 of the HERWIG manual.
andy@124 539 _PDGID2HERWIGID = {}
andy@124 540 _PDGID2HERWIGID[ -1] = 7
andy@124 541 _PDGID2HERWIGID[ -2] = 8
andy@124 542 _PDGID2HERWIGID[ -3] = 9
andy@124 543 _PDGID2HERWIGID[ -4] = 10
andy@124 544 _PDGID2HERWIGID[ -5] = 11
andy@124 545 _PDGID2HERWIGID[ -6] = 12
andy@124 546 _PDGID2HERWIGID[ 21] = 13
andy@124 547 _PDGID2HERWIGID[ 22] = 59
andy@124 548 _PDGID2HERWIGID[ 11] = 121
andy@124 549 _PDGID2HERWIGID[ 12] = 122
andy@124 550 _PDGID2HERWIGID[ 13] = 123
andy@124 551 _PDGID2HERWIGID[ 14] = 124
andy@124 552 _PDGID2HERWIGID[ 15] = 125
andy@124 553 _PDGID2HERWIGID[ 16] = 126
andy@124 554 _PDGID2HERWIGID[ -11] = 127
andy@124 555 _PDGID2HERWIGID[ -12] = 128
andy@124 556 _PDGID2HERWIGID[ -13] = 129
andy@124 557 _PDGID2HERWIGID[ -14] = 130
andy@124 558 _PDGID2HERWIGID[ -15] = 131
andy@124 559 _PDGID2HERWIGID[ -16] = 132
andy@139 560 _PDGID2HERWIGID[ 24] = 198 ## W+
andy@139 561 _PDGID2HERWIGID[ -24] = 199 ## W-
andy@139 562 _PDGID2HERWIGID[ 23] = 200 ## Z
andy@139 563 _PDGID2HERWIGID[ 25] = 203 ## HIGGSL0 (added for PDG standard -> HERWIG IDHW) # TODO: should be 201?
andy@124 564 _PDGID2HERWIGID[ 26] = 203 ## HIGGSL0
andy@124 565 _PDGID2HERWIGID[ 35] = 204 ## HIGGSH0
andy@124 566 _PDGID2HERWIGID[ 36] = 205 ## HIGGSA0
andy@124 567 _PDGID2HERWIGID[ 37] = 206 ## HIGGS+
andy@124 568 _PDGID2HERWIGID[ -37] = 207 ## HIGGS-
andy@124 569 _PDGID2HERWIGID[ 1000001] = 401 ## SSDLBR
andy@124 570 _PDGID2HERWIGID[-1000001] = 407 ## SSDLBR
andy@124 571 _PDGID2HERWIGID[ 1000002] = 402 ## SSULBR
andy@124 572 _PDGID2HERWIGID[-1000002] = 408 ## SSUL
andy@124 573 _PDGID2HERWIGID[ 1000003] = 403 ## SSSLBR
andy@124 574 _PDGID2HERWIGID[-1000003] = 409 ## SSSL
andy@124 575 _PDGID2HERWIGID[ 1000004] = 404 ## SSCLBR
andy@124 576 _PDGID2HERWIGID[-1000004] = 410 ## SSCL
andy@124 577 _PDGID2HERWIGID[ 1000005] = 405 ## SSB1BR
andy@124 578 _PDGID2HERWIGID[-1000005] = 411 ## SSB1
andy@124 579 _PDGID2HERWIGID[ 1000006] = 406 ## SST1BR
andy@124 580 _PDGID2HERWIGID[-1000006] = 412 ## SST1
andy@124 581 _PDGID2HERWIGID[ 2000001] = 413 ## SSDR
andy@124 582 _PDGID2HERWIGID[-2000001] = 419 ## SSDRBR
andy@124 583 _PDGID2HERWIGID[ 2000002] = 414 ## SSUR
andy@124 584 _PDGID2HERWIGID[-2000002] = 420 ## SSURBR
andy@124 585 _PDGID2HERWIGID[ 2000003] = 415 ## SSSR
andy@124 586 _PDGID2HERWIGID[-2000003] = 421 ## SSSRBR
andy@124 587 _PDGID2HERWIGID[ 2000004] = 416 ## SSCR
andy@124 588 _PDGID2HERWIGID[-2000004] = 422 ## SSCRBR
andy@124 589 _PDGID2HERWIGID[ 2000005] = 417 ## SSB2
andy@124 590 _PDGID2HERWIGID[-2000005] = 423 ## SSB2BR
andy@124 591 _PDGID2HERWIGID[ 2000006] = 418 ## SST2
andy@124 592 _PDGID2HERWIGID[-2000006] = 424 ## SST2BR
andy@124 593 _PDGID2HERWIGID[ 1000011] = 425 ## SSEL-
andy@124 594 _PDGID2HERWIGID[-1000011] = 431 ## SSEL+
andy@124 595 _PDGID2HERWIGID[ 1000012] = 426 ## SSNUEL
andy@124 596 _PDGID2HERWIGID[-1000012] = 432 ## SSNUELBR
andy@124 597 _PDGID2HERWIGID[ 1000013] = 427 ## SSMUL-
andy@124 598 _PDGID2HERWIGID[-1000013] = 433 ## SSMUL+
andy@124 599 _PDGID2HERWIGID[ 1000014] = 428 ## SSNUMUL
andy@124 600 _PDGID2HERWIGID[-1000014] = 434 ## SSNUMLBR
andy@124 601 _PDGID2HERWIGID[ 1000015] = 429 ## SSTAU1-
andy@124 602 _PDGID2HERWIGID[-1000015] = 435 ## SSTAU1+
andy@124 603 _PDGID2HERWIGID[ 1000016] = 430 ## SSNUTL
andy@124 604 _PDGID2HERWIGID[-1000016] = 436 ## SSNUTLBR
andy@124 605 _PDGID2HERWIGID[ 2000011] = 437 ## SSEL-
andy@124 606 _PDGID2HERWIGID[-2000011] = 443 ## SSEL+
andy@124 607 _PDGID2HERWIGID[ 2000012] = 438 ## SSNUEL
andy@124 608 _PDGID2HERWIGID[-2000012] = 444 ## SSNUELBR
andy@124 609 _PDGID2HERWIGID[ 2000013] = 439 ## SSMUL-
andy@124 610 _PDGID2HERWIGID[-2000013] = 445 ## SSMUL+
andy@124 611 _PDGID2HERWIGID[ 2000014] = 440 ## SSNUMUL
andy@124 612 _PDGID2HERWIGID[-2000014] = 446 ## SSNUMLBR
andy@124 613 _PDGID2HERWIGID[ 2000015] = 441 ## SSTAU1-
andy@124 614 _PDGID2HERWIGID[-2000015] = 447 ## SSTAU1+
andy@124 615 _PDGID2HERWIGID[ 2000016] = 442 ## SSNUTL
andy@124 616 _PDGID2HERWIGID[-2000016] = 448 ## SSNUTLBR
andy@124 617 _PDGID2HERWIGID[ 1000021] = 449 ## GLUINO
andy@124 618 _PDGID2HERWIGID[ 1000022] = 450 ## NTLINO1
andy@124 619 _PDGID2HERWIGID[ 1000023] = 451 ## NTLINO2
andy@124 620 _PDGID2HERWIGID[ 1000025] = 452 ## NTLINO3
andy@124 621 _PDGID2HERWIGID[ 1000035] = 453 ## NTLINO4
andy@124 622 _PDGID2HERWIGID[ 1000024] = 454 ## CHGINO1+
andy@124 623 _PDGID2HERWIGID[-1000024] = 456 ## CHGINO1-
andy@124 624 _PDGID2HERWIGID[ 1000037] = 455 ## CHGINO2+
andy@124 625 _PDGID2HERWIGID[-1000037] = 457 ## CHGINO2-
andy@124 626 _PDGID2HERWIGID[ 1000039] = 458 ## GRAVTINO
andy@124 627
andy@124 628 def pdgid2herwigid(pdgid):
andy@29 629 """
andy@124 630 Convert a particle ID code in the standard PDG ID code definition into
andy@124 631 its equivalent in the HERWIG internal IDHW format (as used by ISAWIG).
andy@124 632 """
andy@124 633 return _PDGID2HERWIGID.get(pdgid, pdgid)
andy@31 634
andy@29 635
andy@161 636 ###############################################################################
andy@161 637 ## ISAWIG format reading/writing
andy@29 638
andy@29 639
andy@161 640 def readISAWIG(isastr, ignorenobr=False):
andy@48 641 """
andy@161 642 Read a spectrum definition from a string in the ISAWIG format, returning
andy@161 643 dictionaries of blocks and decays. While this is not an SLHA format, it is
andy@161 644 informally supported as a useful mechanism for converting ISAWIG spectra to
andy@161 645 SLHA.
andy@48 646
andy@161 647 ISAWIG parsing based on the HERWIG SUSY specification format, from
andy@161 648 http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/file.html
andy@48 649
andy@161 650 If the ignorenobr parameter is True, do not store decay entries with a
andy@161 651 branching ratio of zero.
andy@48 652 """
andy@161 653
andy@189 654 blocks = _mkdict()
andy@189 655 decays = _mkdict()
andy@161 656 LINES = isastr.splitlines()
andy@161 657
andy@161 658 def getnextvalidline():
andy@161 659 while LINES:
andy@161 660 s = LINES.pop(0).strip()
andy@207 661 # print "*", s, "*"
andy@161 662 ## Return None if EOF reached
andy@161 663 if len(s) == 0:
andy@161 664 continue
andy@161 665 ## Strip comments
andy@161 666 if "#" in s:
andy@161 667 s = s[:s.index("#")].strip()
andy@161 668 ## Return if non-empty
andy@161 669 if len(s) > 0:
andy@161 670 return s
andy@161 671
andy@161 672 def getnextvalidlineitems():
andy@161 673 return map(_autotype, getnextvalidline().split())
andy@161 674
andy@161 675 ## Populate MASS block and create decaying particle objects
andy@161 676 masses = Block("MASS")
andy@161 677 numentries = int(getnextvalidline())
andy@161 678 for i in xrange(numentries):
andy@161 679 hwid, mass, lifetime = getnextvalidlineitems()
andy@161 680 width = 1.0/(lifetime * 1.51926778e24) ## width in GeV == hbar/lifetime in seconds
andy@161 681 pdgid = herwigid2pdgid(hwid)
andy@202 682 masses[pdgid] = mass
andy@161 683 decays[pdgid] = Particle(pdgid, width, mass)
andy@161 684 #print pdgid, mass, width
andy@161 685 blocks["MASS"] = masses
andy@161 686
andy@161 687 ## Populate decays
andy@161 688 for n in xrange(numentries):
andy@161 689 numdecays = int(getnextvalidline())
andy@161 690 for d in xrange(numdecays):
andy@161 691 #print n, numentries-1, d, numdecays-1
andy@161 692 decayitems = getnextvalidlineitems()
andy@161 693 hwid = decayitems[0]
andy@161 694 pdgid = herwigid2pdgid(hwid)
andy@161 695 br = decayitems[1]
andy@161 696 nme = decayitems[2]
andy@161 697 daughter_hwids = decayitems[3:]
andy@161 698 daughter_pdgids = []
andy@161 699 for hw in daughter_hwids:
andy@161 700 if hw != 0:
andy@161 701 daughter_pdgids.append(herwigid2pdgid(hw))
andy@161 702 if not decays.has_key(pdgid):
andy@161 703 #print "Decay for unlisted particle %d, %d" % (hwid, pdgid)
andy@161 704 decays[pdgid] = Particle(pdgid)
andy@161 705 decays[pdgid].add_decay(br, len(daughter_pdgids), daughter_pdgids)
andy@161 706
andy@161 707
andy@161 708 ## Now the SUSY parameters
andy@161 709 TANB, ALPHAH = getnextvalidlineitems()
andy@161 710 blocks["MINPAR"] = Block("MINPAR")
andy@202 711 blocks["MINPAR"][3] = TANB
andy@161 712 blocks["ALPHA"] = Block("ALPHA")
andy@202 713 blocks["ALPHA"][None] = ALPHAH
andy@161 714 #
andy@161 715 ## Neutralino mixing matrix
andy@161 716 blocks["NMIX"] = Block("NMIX")
andy@161 717 for i in xrange(1, 5):
andy@161 718 nmix_i = getnextvalidlineitems()
andy@161 719 for j, v in enumerate(nmix_i):
andy@202 720 blocks["NMIX"][i, j+1] = v
andy@161 721 #
andy@161 722 ## Chargino mixing matrices V and U
andy@161 723 blocks["VMIX"] = Block("VMIX")
andy@161 724 vmix = getnextvalidlineitems()
andy@202 725 blocks["VMIX"][1, 1] = vmix[0]
andy@202 726 blocks["VMIX"][1, 2] = vmix[1]
andy@202 727 blocks["VMIX"][2, 1] = vmix[2]
andy@202 728 blocks["VMIX"][2, 2] = vmix[3]
andy@161 729 blocks["UMIX"] = Block("UMIX")
andy@161 730 umix = getnextvalidlineitems()
andy@202 731 blocks["UMIX"][1, 1] = umix[0]
andy@202 732 blocks["UMIX"][1, 2] = umix[1]
andy@202 733 blocks["UMIX"][2, 1] = umix[2]
andy@202 734 blocks["UMIX"][2, 2] = umix[3]
andy@161 735 #
andy@161 736 THETAT, THETAB, THETAL = getnextvalidlineitems()
andy@161 737 import math
andy@161 738 blocks["STOPMIX"] = Block("STOPMIX")
andy@202 739 blocks["STOPMIX"][1, 1] = math.cos(THETAT)
andy@202 740 blocks["STOPMIX"][1, 2] = -math.sin(THETAT)
andy@202 741 blocks["STOPMIX"][2, 1] = math.sin(THETAT)
andy@202 742 blocks["STOPMIX"][2, 2] = math.cos(THETAT)
andy@161 743 blocks["SBOTMIX"] = Block("SBOTMIX")
andy@202 744 blocks["SBOTMIX"][1, 1] = math.cos(THETAB)
andy@202 745 blocks["SBOTMIX"][1, 2] = -math.sin(THETAB)
andy@202 746 blocks["SBOTMIX"][2, 1] = math.sin(THETAB)
andy@202 747 blocks["SBOTMIX"][2, 2] = math.cos(THETAB)
andy@161 748 blocks["STAUMIX"] = Block("STAUMIX")
andy@202 749 blocks["STAUMIX"][1, 1] = math.cos(THETAL)
andy@202 750 blocks["STAUMIX"][1, 2] = -math.sin(THETAL)
andy@202 751 blocks["STAUMIX"][2, 1] = math.sin(THETAL)
andy@202 752 blocks["STAUMIX"][2, 2] = math.cos(THETAL)
andy@161 753 #
andy@161 754 ATSS, ABSS, ALSS = getnextvalidlineitems()
andy@161 755 blocks["AU"] = Block("AU")
andy@205 756 blocks["AU"][3, 3] = ATSS
andy@161 757 blocks["AD"] = Block("AD")
andy@205 758 blocks["AD"][3, 3] = ABSS
andy@161 759 blocks["AE"] = Block("AE")
andy@205 760 blocks["AE"][3, 3] = ALSS
andy@161 761 #
andy@161 762 MUSS = getnextvalidlineitems()[0]
andy@202 763 blocks["MINPAR"][4] = MUSS
andy@161 764 #
andy@161 765
andy@161 766 # TODO: Parse RPV boolean and couplings into SLHA2 blocks
andy@161 767
andy@161 768 return blocks, decays
andy@161 769
andy@161 770
andy@147 771 def writeISAWIG(blocks, decays, ignorenobr=False, precision=8):
andy@48 772 """
andy@161 773 Return a SUSY spectrum definition in the format produced by ISAWIG for inut to HERWIG
andy@161 774 as a string, from the supplied SLHA blocks and decays dicts.
andy@48 775
andy@48 776 ISAWIG parsing based on the HERWIG SUSY specification format, from
andy@48 777 http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/file.html
andy@48 778
andy@48 779 If the ignorenobr parameter is True, do not write decay entries with a
andy@48 780 branching ratio of zero.
andy@48 781 """
andy@201 782 masses = blocks["MASS"]
andy@48 783
andy@48 784 ## Init output string
andy@48 785 out = ""
andy@48 786
andy@48 787 ## First write out masses section:
andy@48 788 ## Number of SUSY + top particles
andy@48 789 ## IDHW, RMASS(IDHW), RLTIM(IDHW)
andy@48 790 ## repeated for each particle
andy@48 791 ## IDHW is the HERWIG identity code.
andy@48 792 ## RMASS and RTLIM are the mass in GeV, and lifetime in seconds respectively.
andy@48 793 massout = ""
andy@48 794 for pid in masses.keys():
andy@48 795 lifetime = -1
andy@48 796 try:
andy@48 797 width = decays[pid].totalwidth
andy@48 798 if width and width > 0:
andy@48 799 lifetime = 1.0/(width * 1.51926778e24) ## lifetime in seconds == hbar/width in GeV
andy@48 800 except:
andy@48 801 pass
andy@211 802 massout += ("%d " % pdgid2herwigid(pid)) + _autostr(masses[pid], precision) + " " + _autostr(lifetime, precision) + "\n"
andy@48 803 out += "%d\n" % massout.count("\n")
andy@48 804 out += massout
andy@48 805
andy@48 806 assert(len(masses) == len(decays))
andy@48 807
andy@48 808 ## Next each particles decay modes together with their branching ratios and matrix element codes
andy@48 809 ## Number of decay modes for a given particle (IDK)
andy@48 810 ## IDK(*), BRFRAC(*), NME(*) & IDKPRD(1-5,*)
andy@48 811 ## repeated for each mode.
andy@48 812 ## Repeated for each particle.
andy@48 813 ## IDK is the HERWIG code for the decaying particle, BRFRAC is the branching ratio of
andy@48 814 ## the decay mode. NME is a code for the matrix element to be used, either from the
andy@48 815 ## SUSY elements or the main HERWIG MEs. IDKPRD are the HERWIG identity codes of the decay products.
andy@48 816 for i, pid in enumerate(decays.keys()):
andy@48 817 # if not decays.has_key(pid):
andy@48 818 # continue
andy@124 819 hwid = pdgid2herwigid(pid)
andy@48 820 decayout = ""
andy@48 821 #decayout += "@@@@ %d %d %d\n" % (i, pid, hwid)
andy@48 822 for i_d, d in enumerate(decays[pid].decays):
andy@48 823 ## Skip decay if it has no branching ratio
andy@48 824 if ignorenobr and d.br == 0:
andy@48 825 continue
andy@71 826
andy@71 827 ## Identify decay matrix element to use
andy@59 828 ## From std HW docs, or from this pair:
andy@59 829 ## Two new matrix element codes have been added for these new decays:
andy@59 830 ## NME = 200 3 body top quark via charged Higgs
andy@59 831 ## 300 3 body R-parity violating gaugino and gluino decays
andy@71 832 nme = 0
andy@71 833 # TODO: Get correct condition for using ME 100... this guessed from some ISAWIG output
andy@71 834 if abs(pid) in (6, 12):
andy@71 835 nme = 100
andy@71 836 ## Extra SUSY MEs
andy@71 837 if len(d.ids) == 3:
andy@71 838 # TODO: How to determine the conditions for using 200 and 300 MEs? Enumeration of affected decays?
andy@71 839 pass
andy@211 840 decayout += ("%d " % hwid) + _autostr(d.br, precision) + (" %d " % nme)
andy@71 841
andy@71 842 def is_quark(pid):
andy@71 843 return (abs(pid) in range(1, 7))
andy@71 844
andy@71 845 def is_lepton(pid):
andy@71 846 return (abs(pid) in range(11, 17))
andy@71 847
andy@71 848 def is_squark(pid):
andy@71 849 if abs(pid) in range(1000001, 1000007):
andy@71 850 return True
andy@71 851 if abs(pid) in range(2000001, 2000007):
andy@71 852 return True
andy@71 853 return False
andy@71 854
andy@71 855 def is_slepton(pid):
andy@71 856 if abs(pid) in range(1000011, 1000017):
andy@71 857 return True
andy@71 858 if abs(pid) in range(2000011, 2000016, 2):
andy@71 859 return True
andy@71 860 return False
andy@71 861
andy@71 862 def is_gaugino(pid):
andy@71 863 if abs(pid) in range(1000022, 1000026):
andy@71 864 return True
andy@71 865 if abs(pid) in (1000035, 1000037):
andy@71 866 return True
andy@71 867 return False
andy@71 868
andy@71 869 def is_susy(pid):
andy@71 870 return (is_squark(pid) or is_slepton(pid) or is_gaugino(pid) or pid == 1000021)
andy@71 871
andy@71 872 absids = map(abs, d.ids)
andy@71 873
andy@66 874 ## Order decay products as required by HERWIG
andy@66 875 ## Top
andy@66 876 if abs(pid) == 6:
andy@66 877 def cmp_bottomlast(a, b):
andy@66 878 """Comparison function which always puts b/bbar last"""
andy@66 879 if abs(a) == 5:
andy@66 880 return True
andy@71 881 if abs(b) == 5:
andy@66 882 return False
andy@66 883 return cmp(a, b)
andy@66 884 if len(absids) == 2:
andy@66 885 ## 2 body mode, to Higgs: Higgs; Bottom
andy@66 886 if (25 in absids or 26 in absids) and 5 in absids:
andy@199 887 d.ids = sorted(d.ids, cmp=cmp_bottomlast)
andy@66 888 elif len(absids) == 3:
andy@66 889 ## 3 body mode, via charged Higgs/W: quarks or leptons from W/Higgs; Bottom
andy@66 890 if 37 in absids or 23 in absids:
andy@199 891 d.ids = sorted(d.ids, cmp=cmp_bottomlast)
andy@66 892 ## Gluino
andy@66 893 elif abs(pid) == 1000021:
andy@66 894 if len(absids) == 2:
andy@66 895 ## 2 body mode
andy@66 896 ## without gluon: any order
andy@66 897 ## with gluon: gluon; colour neutral
andy@66 898 if 21 in absids:
andy@66 899 def cmp_gluonfirst(a, b):
andy@66 900 """Comparison function which always puts gluon first"""
andy@66 901 if a == 21:
andy@66 902 return False
andy@71 903 if b == 21:
andy@66 904 return True
andy@66 905 return cmp(a, b)
andy@199 906 d.ids = sorted(d.ids, cmp=cmp_gluonfirst)
andy@66 907 elif len(absids) == 3:
andy@66 908 ## 3-body modes, R-parity conserved: colour neutral; q or qbar
andy@70 909 def cmp_quarkslast(a, b):
andy@70 910 """Comparison function which always puts quarks last"""
andy@71 911 if is_quark(a):
andy@70 912 return True
andy@71 913 if is_quark(b):
andy@71 914 return False
andy@71 915 return cmp(a, b)
andy@199 916 d.ids = sorted(d.ids, cmp=cmp_quarkslast)
andy@71 917 ## Squark/Slepton
andy@71 918 elif is_squark(pid) or is_slepton(pid):
andy@73 919 def cmp_susy_quark_lepton(a, b):
andy@71 920 if is_susy(a):
andy@71 921 return False
andy@71 922 if is_susy(b):
andy@71 923 return True
andy@71 924 if is_quark(a):
andy@71 925 return False
andy@71 926 if is_quark(b):
andy@71 927 return True
andy@71 928 return cmp(a, b)
andy@71 929 ## 2 body modes: Gaugino/Gluino with Quark/Lepton Gaugino quark
andy@71 930 ## Gluino lepton
andy@71 931 ## 3 body modes: Weak sparticle particles from W decay
andy@71 932 ## Squark
andy@71 933 ## 2 body modes: Lepton Number Violated quark lepton
andy@71 934 ## Baryon number violated quark quark
andy@71 935 ## Slepton
andy@71 936 ## 2 body modes: Lepton Number Violated q or qbar
andy@199 937 d.ids = sorted(d.ids, cmp=cmp_bottomlast)
andy@71 938 ## Higgs
andy@71 939 elif pid in (25, 26):
andy@71 940 # TODO: Includes SUSY Higgses?
andy@71 941 ## Higgs
andy@71 942 ## 2 body modes: (s)quark-(s)qbar (s)q or (s)qbar
andy@71 943 ## (s)lepton-(s)lepton (s)l or (s)lbar
andy@71 944 ## 3 body modes: colour neutral q or qbar
andy@71 945 if len(absids) == 3:
andy@71 946 def cmp_quarkslast(a, b):
andy@71 947 """Comparison function which always puts quarks last"""
andy@71 948 if is_quark(a):
andy@71 949 return True
andy@71 950 if is_quark(b):
andy@71 951 return False
andy@71 952 return cmp(a, b)
andy@199 953 d.ids = sorted(d.ids, cmp=cmp_quarkslast)
andy@71 954 elif is_gaugino(pid):
andy@71 955 # TODO: Is there actually anything to do here?
andy@71 956 ## Gaugino
andy@71 957 ## 2 body modes: Squark-quark q or sq
andy@71 958 ## Slepton-lepton l or sl
andy@71 959 ##
andy@71 960 ## 3 body modes: R-parity conserved colour neutral q or qbar
andy@71 961 ## l or lbar
andy@71 962 if len(absids) == 3:
andy@71 963 def cmp_quarkslast(a, b):
andy@71 964 """Comparison function which always puts quarks last"""
andy@71 965 if is_quark(a):
andy@71 966 return True
andy@71 967 if is_quark(b):
andy@70 968 return False
andy@70 969 return cmp(a, b)
andy@199 970 d.ids = sorted(d.ids, cmp=cmp_quarkslast)
andy@66 971
andy@71 972 # TODO: Gaugino/Gluino
andy@67 973 ## 3 body modes: R-parity violating: Particles in the same order as the R-parity violating superpotential
andy@66 974
andy@66 975 ## Pad out IDs list with zeros
andy@48 976 ids = [0,0,0,0,0]
andy@48 977 for i, pid in enumerate(d.ids):
andy@48 978 ids[i] = pid
andy@48 979 ids = map(str, ids)
andy@48 980 decayout += " ".join(ids) + "\n"
andy@48 981 decayout = "%d\n" % decayout.count("\n") + decayout
andy@48 982 out += decayout
andy@48 983
andy@48 984 ## Now the SUSY parameters
andy@48 985 ## TANB, ALPHAH:
andy@211 986 out += _autostr(blocks["MINPAR"][3], precision) + " " + _autostr(blocks["ALPHA"].value(), precision) + "\n"
andy@48 987 ## Neutralino mixing matrix
andy@200 988 nmix = blocks["NMIX"]
andy@48 989 for i in xrange(1, 5):
andy@211 990 out += _autostr(nmix[i,1], precision) + " " + \
andy@211 991 _autostr(nmix[i,2], precision) + " " + \
andy@211 992 _autostr(nmix[i,3], precision) + " " + \
andy@211 993 _autostr(nmix[i,4], precision) + "\n"
andy@48 994 ## Chargino mixing matrices V and U
andy@200 995 vmix = blocks["VMIX"]
andy@211 996 out += _autostr(vmix[1,1], precision) + " " + \
andy@211 997 _autostr(vmix[1,2], precision) + " " + \
andy@211 998 _autostr(vmix[2,1], precision) + " " + \
andy@211 999 _autostr(vmix[2,2], precision) + "\n"
andy@200 1000 umix = blocks["UMIX"]
andy@211 1001 out += _autostr(umix[1,1], precision) + " " + \
andy@211 1002 _autostr(umix[1,2], precision) + " " + \
andy@211 1003 _autostr(umix[2,1], precision) + " " + \
andy@211 1004 _autostr(umix[2,2], precision) + "\n"
andy@160 1005 ## THETAT,THETAB,THETAL
andy@48 1006 import math
andy@211 1007 out += _autostr(math.acos(blocks["STOPMIX"][1,1]), precision) + " " + \
andy@211 1008 _autostr(math.acos(blocks["SBOTMIX"][1,1]), precision) + " " + \
andy@211 1009 _autostr(math.acos(blocks["STAUMIX"][1,1]), precision) + "\n"
andy@160 1010 ## ATSS,ABSS,ALSS
andy@211 1011 out += _autostr(blocks["AU"][3,3], precision) + " " + \
andy@211 1012 _autostr(blocks["AD"][3,3], precision) + " " + \
andy@211 1013 _autostr(blocks["AE"][3,3], precision) + "\n"
andy@160 1014 ## MUSS == sign(mu)
andy@201 1015 out += "%f\n" % blocks["MINPAR"][4]
andy@48 1016
andy@160 1017 ## RPV SUSY
andy@160 1018 isRPV = False
andy@160 1019 out += "%d\n" % isRPV
andy@160 1020 # TODO: Write RPV couplings if RPV is True (lambda1,2,3; 27 params in each, sci format.
andy@160 1021 # TODO: Get the index orderings right
andy@160 1022 # if isRPV: ...
andy@48 1023
andy@48 1024 return out
andy@48 1025
andy@48 1026
andy@161 1027 ###############################################################################
andy@161 1028 ## File-level functions
andy@161 1029
andy@161 1030
andy@161 1031 def readSLHAFile(spcfilename, **kwargs):
andy@161 1032 """
andy@161 1033 Read an SLHA file, returning dictionaries of blocks and decays.
andy@161 1034
andy@161 1035 Other keyword parameters are passed to readSLHA.
andy@161 1036 """
andy@161 1037 f = open(spcfilename, "r")
andy@161 1038 rtn = readSLHA(f.read(), kwargs)
andy@161 1039 f.close()
andy@161 1040 return rtn
andy@161 1041
andy@161 1042
andy@161 1043 def writeSLHAFile(spcfilename, blocks, decays, **kwargs):
andy@161 1044 """
andy@161 1045 Write an SLHA file from the supplied blocks and decays dicts.
andy@161 1046
andy@161 1047 Other keyword parameters are passed to writeSLHA.
andy@161 1048 """
andy@161 1049 f = open(spcfilename, "w")
andy@161 1050 f.write(writeSLHA(blocks, decays, kwargs))
andy@161 1051 f.close()
andy@161 1052
andy@161 1053
andy@161 1054 def readISAWIGFile(isafilename, **kwargs):
andy@161 1055 """
andy@161 1056 Read a spectrum definition from a file in the ISAWIG format, returning
andy@161 1057 dictionaries of blocks and decays. While this is not an SLHA format, it is
andy@161 1058 informally supported as a useful mechanism for converting ISAWIG spectra to
andy@161 1059 SLHA.
andy@161 1060
andy@161 1061 Other keyword parameters are passed to readSLHA.
andy@161 1062 """
andy@161 1063 f = open(isafilename, "r")
andy@161 1064 rtn = readISAWIG(f.read(), kwargs)
andy@161 1065 f.close()
andy@161 1066 return rtn
andy@161 1067
andy@161 1068
andy@161 1069 def writeISAWIGFile(isafilename, blocks, decays, **kwargs):
andy@161 1070 """
andy@161 1071 Write an ISAWIG file from the supplied blocks and decays dicts.
andy@161 1072
andy@161 1073 Other keyword parameters are passed to writeISAWIG.
andy@161 1074 """
andy@161 1075 f = open(isafilename, "w")
andy@161 1076 f.write(writeISAWIG(blocks, decays, kwargs))
andy@161 1077 f.close()
andy@161 1078
andy@161 1079
andy@161 1080 def writeISAJETFile(isafilename, blocks, decays, **kwargs):
andy@161 1081 """
andy@161 1082 Write an ISAJET file from the supplied blocks and decays dicts (see writeISAJET).
andy@161 1083
andy@161 1084 Other keyword parameters are passed to writeISAJET.
andy@161 1085 """
andy@161 1086 f = open(isafilename, "w")
andy@161 1087 f.write(writeISAWIG(blocks, decays, kwargs))
andy@161 1088 f.close()
andy@161 1089
andy@161 1090
andy@161 1091
andy@161 1092 ###############################################################################
andy@161 1093 ## Main function for module testing
andy@161 1094
andy@48 1095
andy@1 1096 if __name__ == "__main__":
andy@1 1097 import sys
andy@1 1098 for a in sys.argv[1:]:
andy@35 1099 if a.endswith(".isa"):
andy@35 1100 blocks, decays = readISAWIGFile(a)
andy@35 1101 else:
andy@35 1102 blocks, decays = readSLHAFile(a)
andy@3 1103
andy@5 1104 for bname, b in sorted(blocks.iteritems()):
andy@5 1105 print b
andy@5 1106 print
andy@3 1107
andy@47 1108 print blocks.keys()
andy@47 1109
andy@201 1110 print blocks["MASS"][25]
andy@6 1111 print
andy@6 1112
andy@6 1113 for p in sorted(decays.values()):
andy@6 1114 print p
andy@6 1115 print
andy@29 1116
andy@31 1117 print writeSLHA(blocks, decays, ignorenobr=True)

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