pyslha.py

Mon, 29 Apr 2013 15:04:31 +0200

author
Andy Buckley <andy@insectnation.org>
date
Mon, 29 Apr 2013 15:04:31 +0200
changeset 214
fa07ed634b18
parent 213
11aef4bd7802
child 215
8a64587e884f
permissions
-rw-r--r--

Better newline handling in final SLHA output formatting

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

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