pyslha.py

Wed, 26 Jan 2011 16:10:01 +0000

author
Andy Buckley <andy@insectnation.org>
date
Wed, 26 Jan 2011 16:10:01 +0000
changeset 111
4f426f1f5923
parent 109
0502c4942fbc
child 118
5ab517422296
permissions
-rw-r--r--

Merge in a version of decay line color scaling in proportion to branching ratio, from Martin Spinrath

andy@1 1 #! /usr/bin/env python
andy@1 2
andy@8 3 """\
andy@8 4 A simple but flexible parser of SUSY Les Houches Accord (SLHA) model and decay files.
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@52 11 The current release supports SLHA version 1. Assistance with supporting version
andy@52 12 2 will be gladly accepted!
andy@52 13
andy@99 14 The plotting script provides output in PDF via LaTeX and the TikZ graphics package,
andy@99 15 as LaTeX/TikZ source for direct embedding into documents, and in the format used by
andy@99 16 the Rivet make-plots system.
andy@64 17
andy@52 18 TODOs:
andy@64 19 * Identify HERWIG decay matrix element to use in ISAWIG
andy@52 20 * Split writeSLHA into writeSLHA{Blocks,Decays}
andy@52 21 * Handle SLHA2
andy@52 22 * Handle RPV SUSY in ISAWIG
andy@8 23 """
andy@8 24
andy@8 25 __author__ = "Andy Buckley <andy.buckley@cern.ch"
andy@111 26 __version__ = "1.0.6"
andy@8 27
andy@1 28
andy@4 29 def _autotype(var):
andy@30 30 """Automatically convert strings to numerical types if possible."""
andy@30 31 if type(var) is not str:
andy@4 32 return var
andy@36 33 if var.isdigit() or (var.startswith("-") and var[1:].isdigit()):
andy@4 34 return int(var)
andy@4 35 try:
andy@4 36 f = float(var)
andy@4 37 return f
andy@4 38 except ValueError:
andy@4 39 return var
andy@4 40
andy@30 41 def _autostr(var):
andy@30 42 """Automatically numerical types to the right sort of string."""
andy@30 43 if type(var) is float:
andy@30 44 return "%e" % var
andy@30 45 return str(var)
andy@30 46
andy@30 47
andy@4 48
andy@12 49 class Block(object):
andy@8 50 """
andy@8 51 Object representation of any BLOCK elements read from the SLHA file. Blocks
andy@8 52 have a name, may have an associated Q value, and then a collection of data
andy@8 53 entries, stored as a recursive dictionary. Types in the dictionary are
andy@8 54 numeric (int or float) when a cast from the string in the file has been
andy@8 55 possible.
andy@8 56 """
andy@5 57 def __init__(self, name, q=None):
andy@1 58 self.name = name
andy@1 59 self.entries = {}
andy@5 60 self.q = _autotype(q)
andy@1 61
andy@1 62 def add_entry(self, entry):
andy@1 63 #print entry
andy@1 64 nextparent = self.entries
andy@1 65 if len(entry) < 2:
andy@1 66 raise Exception("Block entries must be at least a 2-tuple")
andy@4 67 #print "in", entry
andy@4 68 entry = map(_autotype, entry)
andy@4 69 #print "out", entry
andy@1 70 for e in entry[:-2]:
andy@1 71 if e is not entry[-1]:
andy@1 72 nextparent = nextparent.setdefault(e, {})
andy@1 73 nextparent[entry[-2]] = entry[-1]
andy@1 74 #print self.entries
andy@1 75
andy@1 76 def __cmp__(self, other):
andy@31 77 return cmp(self.name, other.name)
andy@1 78
andy@1 79 def __str__(self):
andy@1 80 s = self.name
andy@5 81 if self.q is not None:
andy@5 82 s += " (Q=%s)" % self.q
andy@1 83 s += "\n"
andy@1 84 s += str(self.entries)
andy@1 85 return s
andy@1 86
andy@1 87
andy@12 88 class Decay(object):
andy@8 89 """
andy@8 90 Object representing a decay entry on a particle decribed by the SLHA file.
andy@8 91 'Decay' objects are not a direct representation of a DECAY block in an SLHA
andy@8 92 file... that role, somewhat confusingly, is taken by the Particle class.
andy@8 93
andy@8 94 Decay objects have three properties: a branching ratio, br, an nda number
andy@12 95 (number of daughters == len(ids)), and a tuple of PDG PIDs to which the
andy@12 96 decay occurs. The PDG ID of the particle whose decay this represents may
andy@12 97 also be stored, but this is normally known via the Particle in which the
andy@12 98 decay is stored.
andy@8 99 """
andy@8 100 def __init__(self, br, nda, ids, parentid=None):
andy@8 101 self.parentid = parentid
andy@6 102 self.br = br
andy@6 103 self.nda = nda
andy@6 104 self.ids = ids
andy@29 105 assert(self.nda == len(self.ids))
andy@6 106
andy@6 107 def __cmp__(self, other):
andy@31 108 return cmp(other.br, self.br)
andy@6 109
andy@6 110 def __str__(self):
andy@12 111 return "%e %s" % (self.br, self.ids)
andy@6 112
andy@6 113
andy@12 114 class Particle(object):
andy@8 115 """
andy@8 116 Representation of a single, specific particle, decay block from an SLHA
andy@8 117 file. These objects are not themselves called 'Decay', since that concept
andy@8 118 applies more naturally to the various decays found inside this
andy@8 119 object. Particle classes store the PDG ID (pid) of the particle being
andy@8 120 represented, and optionally the mass (mass) and total decay width
andy@8 121 (totalwidth) of that particle in the SLHA scenario. Masses may also be found
andy@8 122 via the MASS block, from which the Particle.mass property is filled, if at
andy@8 123 all. They also store a list of Decay objects (decays) which are probably the
andy@8 124 item of most interest.
andy@8 125 """
andy@6 126 def __init__(self, pid, totalwidth=None, mass=None):
andy@6 127 self.pid = pid
andy@6 128 self.totalwidth = totalwidth
andy@6 129 self.mass = mass
andy@6 130 self.decays = []
andy@6 131
andy@6 132 def add_decay(self, br, nda, ids):
andy@6 133 self.decays.append(Decay(br, nda, ids))
andy@6 134 self.decays.sort()
andy@6 135
andy@6 136 def __cmp__(self, other):
andy@6 137 if abs(self.pid) == abs(other.pid):
andy@31 138 return cmp(self.pid, other.pid)
andy@31 139 return cmp(abs(self.pid), abs(other.pid))
andy@6 140
andy@6 141 def __str__(self):
andy@6 142 s = str(self.pid)
andy@7 143 if self.mass is not None:
andy@7 144 s += " : mass = %e GeV" % self.mass
andy@6 145 if self.totalwidth is not None:
andy@7 146 s += " : total width = %e GeV" % self.totalwidth
andy@6 147 for d in self.decays:
andy@12 148 if d.br > 0.0:
andy@12 149 s += "\n %s" % d
andy@6 150 return s
andy@1 151
andy@1 152
andy@31 153 def readSLHAFile(spcfilename, **kwargs):
andy@21 154 """
andy@21 155 Read an SLHA file, returning dictionaries of blocks and decays.
andy@31 156
andy@31 157 Other keyword parameters are passed to readSLHA.
andy@21 158 """
andy@68 159 f = open(spcfilename, "r")
andy@68 160 rtn = readSLHA(f.read(), kwargs)
andy@68 161 f.close()
andy@68 162 return rtn
andy@21 163
andy@21 164
andy@31 165 def readSLHA(spcstr, ignorenobr=False):
andy@21 166 """
andy@31 167 Read an SLHA definition from a string, returning dictionaries of blocks and
andy@31 168 decays.
andy@31 169
andy@31 170 If the ignorenobr parameter is True, do not store decay entries with a
andy@31 171 branching ratio of zero.
andy@21 172 """
andy@1 173 blocks = {}
andy@1 174 decays = {}
andy@21 175 #
andy@34 176 import re
andy@21 177 currentblock = None
andy@21 178 currentdecay = None
andy@21 179 for line in spcstr.splitlines():
andy@21 180 ## Handle (ignore) comment lines
andy@21 181 if line.startswith("#"):
andy@21 182 continue
andy@21 183 if "#" in line:
andy@21 184 line = line[:line.index("#")]
andy@21 185
andy@21 186 ## Handle BLOCK/DECAY start lines
andy@21 187 if line.upper().startswith("BLOCK"):
andy@47 188 #print line
andy@47 189 match = re.match(r"BLOCK\s+(\w+)(\s+Q=\s*.+)?", line.upper())
andy@21 190 if not match:
andy@8 191 continue
andy@21 192 blockname = match.group(1)
andy@21 193 qstr = match.group(2)
andy@21 194 if qstr is not None:
andy@21 195 qstr = qstr[2:].strip()
andy@21 196 currentblock = blockname
andy@21 197 currentdecay = None
andy@21 198 blocks[blockname] = Block(blockname, q=qstr)
andy@21 199 elif line.upper().startswith("DECAY"):
andy@21 200 match = re.match(r"DECAY\s+(\d+)\s+([\d\.E+-]+).*", line.upper())
andy@21 201 if not match:
andy@21 202 continue
andy@21 203 pdgid = int(match.group(1))
andy@21 204 width = float(match.group(2))
andy@21 205 currentblock = "DECAY"
andy@21 206 currentdecay = pdgid
andy@21 207 decays[pdgid] = Particle(pdgid, width)
andy@21 208 else:
andy@21 209 ## In-block line
andy@21 210 if currentblock is not None:
andy@21 211 items = line.split()
andy@21 212 if len(items) < 1:
andy@6 213 continue
andy@21 214 if currentblock != "DECAY":
andy@21 215 if len(items) < 2:
andy@21 216 ## Treat the ALPHA block differently
andy@21 217 blocks[currentblock].value = _autotype(items[0])
andy@33 218 blocks[currentblock].entries = _autotype(items[0])
andy@8 219 else:
andy@21 220 blocks[currentblock].add_entry(items)
andy@21 221 else:
andy@21 222 br = float(items[0])
andy@21 223 nda = int(items[1])
andy@21 224 ids = map(int, items[2:])
andy@31 225 if br > 0.0 or not ignorenobr:
andy@31 226 decays[currentdecay].add_decay(br, nda, ids)
andy@1 227
andy@8 228 ## Try to populate Particle masses from the MASS block
andy@47 229 # print blocks.keys()
andy@47 230 try:
andy@47 231 for pid in blocks["MASS"].entries.keys():
andy@47 232 if decays.has_key(pid):
andy@47 233 decays[pid].mass = blocks["MASS"].entries[pid]
andy@47 234 except:
andy@47 235 raise Exception("No MASS block found, from which to populate particle masses")
andy@8 236
andy@1 237 return blocks, decays
andy@1 238
andy@1 239
andy@33 240 def readISAWIGFile(isafilename, **kwargs):
andy@33 241 """
andy@33 242 Read a spectrum definition from a file in the ISAWIG format, returning
andy@33 243 dictionaries of blocks and decays. While this is not an SLHA format, it is
andy@33 244 informally supported as a useful mechanism for converting ISAWIG spectra to
andy@33 245 SLHA.
andy@33 246
andy@33 247 Other keyword parameters are passed to readSLHA.
andy@33 248 """
andy@68 249 f = open(isafilename, "r")
andy@68 250 rtn = readISAWIG(f.read(), kwargs)
andy@68 251 f.close()
andy@68 252 return rtn
andy@33 253
andy@33 254
andy@33 255 def readISAWIG(isastr, ignorenobr=False):
andy@33 256 """
andy@33 257 Read a spectrum definition from a string in the ISAWIG format, returning
andy@33 258 dictionaries of blocks and decays. While this is not an SLHA format, it is
andy@33 259 informally supported as a useful mechanism for converting ISAWIG spectra to
andy@33 260 SLHA.
andy@33 261
andy@33 262 ISAWIG parsing based on the HERWIG SUSY specification format, from
andy@33 263 http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/file.html
andy@33 264
andy@33 265 If the ignorenobr parameter is True, do not store decay entries with a
andy@33 266 branching ratio of zero.
andy@33 267 """
andy@33 268
andy@33 269 ## PDG MC ID codes mapped to HERWIG SUSY ID codes, based on
andy@33 270 ## http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/susycodes.html
andy@33 271 HERWIGID2PDGID = {}
andy@33 272 HERWIGID2PDGID[203] = 25 ## HIGGSL0
andy@33 273 HERWIGID2PDGID[204] = 35 ## HIGGSH0
andy@33 274 HERWIGID2PDGID[205] = 36 ## HIGGSA0
andy@33 275 HERWIGID2PDGID[206] = 37 ## HIGGS+
andy@33 276 HERWIGID2PDGID[207] = -37 ## HIGGS-
andy@33 277 HERWIGID2PDGID[401] = 1000001 ## SSDLBR
andy@33 278 HERWIGID2PDGID[407] = -1000001 ## SSDLBR
andy@33 279 HERWIGID2PDGID[402] = 1000002 ## SSULBR
andy@33 280 HERWIGID2PDGID[408] = -1000002 ## SSUL
andy@33 281 HERWIGID2PDGID[403] = 1000003 ## SSSLBR
andy@33 282 HERWIGID2PDGID[409] = -1000003 ## SSSL
andy@33 283 HERWIGID2PDGID[404] = 1000004 ## SSCLBR
andy@33 284 HERWIGID2PDGID[410] = -1000004 ## SSCL
andy@33 285 HERWIGID2PDGID[405] = 1000005 ## SSB1BR
andy@33 286 HERWIGID2PDGID[411] = -1000005 ## SSB1
andy@33 287 HERWIGID2PDGID[406] = 1000006 ## SST1BR
andy@33 288 HERWIGID2PDGID[412] = -1000006 ## SST1
andy@33 289 HERWIGID2PDGID[413] = 2000001 ## SSDR
andy@33 290 HERWIGID2PDGID[419] = -2000001 ## SSDRBR
andy@33 291 HERWIGID2PDGID[414] = 2000002 ## SSUR
andy@33 292 HERWIGID2PDGID[420] = -2000002 ## SSURBR
andy@33 293 HERWIGID2PDGID[415] = 2000003 ## SSSR
andy@33 294 HERWIGID2PDGID[421] = -2000003 ## SSSRBR
andy@33 295 HERWIGID2PDGID[416] = 2000004 ## SSCR
andy@33 296 HERWIGID2PDGID[422] = -2000004 ## SSCRBR
andy@33 297 HERWIGID2PDGID[417] = 2000005 ## SSB2
andy@33 298 HERWIGID2PDGID[423] = -2000005 ## SSB2BR
andy@33 299 HERWIGID2PDGID[418] = 2000006 ## SST2
andy@33 300 HERWIGID2PDGID[424] = -2000006 ## SST2BR
andy@33 301 HERWIGID2PDGID[425] = 1000011 ## SSEL-
andy@33 302 HERWIGID2PDGID[431] = -1000011 ## SSEL+
andy@33 303 HERWIGID2PDGID[426] = 1000012 ## SSNUEL
andy@33 304 HERWIGID2PDGID[432] = -1000012 ## SSNUELBR
andy@33 305 HERWIGID2PDGID[427] = 1000013 ## SSMUL-
andy@33 306 HERWIGID2PDGID[433] = -1000013 ## SSMUL+
andy@33 307 HERWIGID2PDGID[428] = 1000014 ## SSNUMUL
andy@33 308 HERWIGID2PDGID[434] = -1000014 ## SSNUMLBR
andy@33 309 HERWIGID2PDGID[429] = 1000015 ## SSTAU1-
andy@33 310 HERWIGID2PDGID[435] = -1000015 ## SSTAU1+
andy@33 311 HERWIGID2PDGID[430] = 1000016 ## SSNUTL
andy@33 312 HERWIGID2PDGID[436] = -1000016 ## SSNUTLBR
andy@33 313 HERWIGID2PDGID[437] = 2000011 ## SSEL-
andy@33 314 HERWIGID2PDGID[443] = -2000011 ## SSEL+
andy@33 315 HERWIGID2PDGID[438] = 2000012 ## SSNUEL
andy@33 316 HERWIGID2PDGID[444] = -2000012 ## SSNUELBR
andy@33 317 HERWIGID2PDGID[439] = 2000013 ## SSMUL-
andy@33 318 HERWIGID2PDGID[445] = -2000013 ## SSMUL+
andy@33 319 HERWIGID2PDGID[440] = 2000014 ## SSNUMUL
andy@33 320 HERWIGID2PDGID[446] = -2000014 ## SSNUMLBR
andy@33 321 HERWIGID2PDGID[441] = 2000015 ## SSTAU1-
andy@33 322 HERWIGID2PDGID[447] = -2000015 ## SSTAU1+
andy@33 323 HERWIGID2PDGID[442] = 2000016 ## SSNUTL
andy@33 324 HERWIGID2PDGID[448] = -2000016 ## SSNUTLBR
andy@33 325 HERWIGID2PDGID[449] = 1000021 ## GLUINO
andy@33 326 HERWIGID2PDGID[450] = 1000022 ## NTLINO1
andy@33 327 HERWIGID2PDGID[451] = 1000023 ## NTLINO2
andy@33 328 HERWIGID2PDGID[452] = 1000025 ## NTLINO3
andy@33 329 HERWIGID2PDGID[453] = 1000035 ## NTLINO4
andy@33 330 HERWIGID2PDGID[454] = 1000024 ## CHGINO1+
andy@33 331 HERWIGID2PDGID[456] = -1000024 ## CHGINO1-
andy@33 332 HERWIGID2PDGID[455] = 1000037 ## CHGINO2+
andy@33 333 HERWIGID2PDGID[457] = -1000037 ## CHGINO2-
andy@33 334 HERWIGID2PDGID[458] = 1000039 ## GRAVTINO
andy@33 335
andy@33 336 blocks = {}
andy@33 337 decays = {}
andy@35 338 LINES = isastr.splitlines()
andy@33 339
andy@33 340 def getnextvalidline():
andy@35 341 while LINES:
andy@35 342 s = LINES.pop(0).strip()
andy@33 343 ## Return None if EOF reached
andy@33 344 if len(s) == 0:
andy@33 345 continue
andy@33 346 ## Strip comments
andy@33 347 if "#" in s:
andy@33 348 s = s[:s.index("#")].strip()
andy@33 349 ## Return if non-empty
andy@33 350 if len(s) > 0:
andy@33 351 return s
andy@33 352
andy@34 353 def getnextvalidlineitems():
andy@34 354 return map(_autotype, getnextvalidline().split())
andy@34 355
andy@34 356 ## Populate MASS block and create decaying particle objects
andy@35 357 masses = Block("MASS")
andy@33 358 numentries = int(getnextvalidline())
andy@33 359 for i in xrange(numentries):
andy@34 360 hwid, mass, lifetime = getnextvalidlineitems()
andy@34 361 width = 1.0/(lifetime * 1.51926778e24) ## width in GeV == hbar/lifetime in seconds
andy@34 362 pdgid = HERWIGID2PDGID.get(hwid, hwid)
andy@34 363 masses.add_entry((pdgid, mass))
andy@34 364 decays[pdgid] = Particle(pdgid, width, mass)
andy@34 365 #print pdgid, mass, width
andy@34 366 blocks["MASS"] = masses
andy@33 367
andy@34 368 ## Populate decays
andy@34 369 for n in xrange(numentries):
andy@34 370 numdecays = int(getnextvalidline())
andy@34 371 for d in xrange(numdecays):
andy@40 372 #print n, numentries-1, d, numdecays-1
andy@34 373 decayitems = getnextvalidlineitems()
andy@34 374 hwid = decayitems[0]
andy@34 375 pdgid = HERWIGID2PDGID.get(hwid, hwid)
andy@34 376 br = decayitems[1]
andy@34 377 nme = decayitems[2]
andy@34 378 daughter_hwids = decayitems[3:]
andy@34 379 daughter_pdgids = []
andy@34 380 for hw in daughter_hwids:
andy@34 381 if hw != 0:
andy@34 382 daughter_pdgids.append(HERWIGID2PDGID.get(hw, hw))
andy@35 383 if not decays.has_key(pdgid):
andy@40 384 #print "Decay for unlisted particle %d, %d" % (hwid, pdgid)
andy@38 385 decays[pdgid] = Particle(pdgid)
andy@38 386 decays[pdgid].add_decay(br, len(daughter_pdgids), daughter_pdgids)
andy@33 387
andy@33 388
andy@34 389 ## Now the SUSY parameters
andy@34 390 TANB, ALPHAH = getnextvalidlineitems()
andy@34 391 blocks["MINPAR"] = Block("MINPAR")
andy@34 392 blocks["MINPAR"].add_entry((3, TANB))
andy@34 393 blocks["ALPHA"] = Block("ALPHA")
andy@34 394 blocks["ALPHA"].entries = ALPHAH
andy@34 395 #
andy@34 396 ## Neutralino mixing matrix
andy@34 397 blocks["NMIX"] = Block("NMIX")
andy@34 398 for i in xrange(1, 5):
andy@34 399 nmix_i = getnextvalidlineitems()
andy@34 400 for j, v in enumerate(nmix_i):
andy@34 401 blocks["NMIX"].add_entry((i, j+1, v))
andy@34 402 #
andy@34 403 ## Chargino mixing matrices V and U
andy@34 404 blocks["VMIX"] = Block("VMIX")
andy@34 405 vmix = getnextvalidlineitems()
andy@34 406 blocks["VMIX"].add_entry((1, 1, vmix[0]))
andy@34 407 blocks["VMIX"].add_entry((1, 2, vmix[1]))
andy@34 408 blocks["VMIX"].add_entry((2, 1, vmix[2]))
andy@34 409 blocks["VMIX"].add_entry((2, 2, vmix[3]))
andy@34 410 blocks["UMIX"] = Block("UMIX")
andy@34 411 umix = getnextvalidlineitems()
andy@34 412 blocks["UMIX"].add_entry((1, 1, umix[0]))
andy@34 413 blocks["UMIX"].add_entry((1, 2, umix[1]))
andy@34 414 blocks["UMIX"].add_entry((2, 1, umix[2]))
andy@34 415 blocks["UMIX"].add_entry((2, 2, umix[3]))
andy@34 416 #
andy@34 417 THETAT, THETAB, THETAL = getnextvalidlineitems()
andy@34 418 import math
andy@34 419 blocks["STOPMIX"] = Block("STOPMIX")
andy@34 420 blocks["STOPMIX"].add_entry((1, 1, math.cos(THETAT)))
andy@34 421 blocks["STOPMIX"].add_entry((1, 2, -math.sin(THETAT)))
andy@34 422 blocks["STOPMIX"].add_entry((2, 1, math.sin(THETAT)))
andy@34 423 blocks["STOPMIX"].add_entry((2, 2, math.cos(THETAT)))
andy@34 424 blocks["SBOTMIX"] = Block("SBOTMIX")
andy@34 425 blocks["SBOTMIX"].add_entry((1, 1, math.cos(THETAB)))
andy@34 426 blocks["SBOTMIX"].add_entry((1, 2, -math.sin(THETAB)))
andy@34 427 blocks["SBOTMIX"].add_entry((2, 1, math.sin(THETAB)))
andy@34 428 blocks["SBOTMIX"].add_entry((2, 2, math.cos(THETAB)))
andy@34 429 blocks["STAUMIX"] = Block("STAUMIX")
andy@34 430 blocks["STAUMIX"].add_entry((1, 1, math.cos(THETAL)))
andy@34 431 blocks["STAUMIX"].add_entry((1, 2, -math.sin(THETAL)))
andy@34 432 blocks["STAUMIX"].add_entry((2, 1, math.sin(THETAL)))
andy@34 433 blocks["STAUMIX"].add_entry((2, 2, math.cos(THETAL)))
andy@34 434 #
andy@34 435 ATSS, ABSS, ALSS = getnextvalidlineitems()
andy@34 436 blocks["AU"] = Block("AU")
andy@34 437 blocks["AU"].add_entry((3, 3, ATSS))
andy@34 438 blocks["AD"] = Block("AD")
andy@34 439 blocks["AD"].add_entry((3, 3, ABSS))
andy@34 440 blocks["AE"] = Block("AE")
andy@34 441 blocks["AE"].add_entry((3, 3, ALSS))
andy@34 442 #
andy@34 443 MUSS = getnextvalidlineitems()[0]
andy@34 444 blocks["MINPAR"].add_entry((4, MUSS))
andy@34 445 #
andy@34 446 return blocks, decays
andy@33 447
andy@21 448
andy@31 449 def writeSLHAFile(spcfilename, blocks, decays, **kwargs):
andy@29 450 """
andy@29 451 Write an SLHA file from the supplied blocks and decays dicts.
andy@31 452
andy@31 453 Other keyword parameters are passed to writeSLHA.
andy@29 454 """
andy@68 455 f = open(spcfilename, "w")
andy@68 456 f.write(writeSLHA(blocks, decays, kwargs))
andy@68 457 f.close()
andy@29 458
andy@29 459
andy@68 460 # TODO: Split writeSLHA into writeSLHA{Blocks,Decays}
andy@68 461
andy@33 462
andy@31 463 def writeSLHA(blocks, decays, ignorenobr=False):
andy@29 464 """
andy@29 465 Return an SLHA definition as a string, from the supplied blocks and decays dicts.
andy@29 466 """
andy@31 467 sep = " "
andy@29 468 out = ""
andy@30 469 def dict_hier_strs(d, s=""):
andy@30 470 if type(d) is dict:
andy@30 471 for k, v in sorted(d.iteritems()):
andy@31 472 for s2 in dict_hier_strs(v, s + sep + _autostr(k)):
andy@30 473 yield s2
andy@30 474 else:
andy@31 475 yield s + sep + _autostr(d)
andy@30 476 ## Blocks
andy@30 477 for bname, b in sorted(blocks.iteritems()):
andy@29 478 namestr = b.name
andy@29 479 if b.q is not None:
andy@29 480 namestr += " Q= %e" % b.q
andy@29 481 out += "BLOCK %s\n" % namestr
andy@30 482 for s in dict_hier_strs(b.entries):
andy@31 483 out += sep + s + "\n"
andy@29 484 out += "\n"
andy@30 485 ## Decays
andy@30 486 for pid, particle in sorted(decays.iteritems()):
andy@40 487 out += "DECAY %d %e\n" % (particle.pid, particle.totalwidth or -1)
andy@30 488 for d in sorted(particle.decays):
andy@31 489 if d.br > 0.0 or not ignorenobr:
andy@31 490 products_str = " ".join(map(str, d.ids))
andy@31 491 out += sep + "%e" % d.br + sep + "%d" % len(d.ids) + sep + products_str + "\n"
andy@29 492 out += "\n"
andy@29 493 return out
andy@29 494
andy@29 495
andy@29 496
andy@48 497 def writeISAWIGFile(isafilename, blocks, decays, **kwargs):
andy@48 498 """
andy@48 499 Write an ISAWIG file from the supplied blocks and decays dicts.
andy@48 500
andy@48 501 Other keyword parameters are passed to writeISAWIG.
andy@48 502
andy@48 503 TODO: Handle RPV SUSY
andy@48 504 """
andy@68 505 f = open(isafilename, "w")
andy@68 506 f.write(writeISAWIG(blocks, decays, kwargs))
andy@68 507 f.close()
andy@48 508
andy@48 509
andy@48 510 def writeISAWIG(blocks, decays, ignorenobr=False):
andy@48 511 """
andy@48 512 Return an ISAWIG definition as a string, from the supplied blocks and decays dicts.
andy@48 513
andy@48 514 ISAWIG parsing based on the HERWIG SUSY specification format, from
andy@48 515 http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/file.html
andy@48 516
andy@48 517 If the ignorenobr parameter is True, do not write decay entries with a
andy@48 518 branching ratio of zero.
andy@48 519 """
andy@48 520 ## PDG MC ID codes mapped to HERWIG SUSY ID codes, based on
andy@48 521 ## http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/susycodes.html
andy@48 522 PDGID2HERWIGID = {}
andy@48 523 PDGID2HERWIGID[ 25] = 203 ## HIGGSL0 (ADDED)
andy@48 524 PDGID2HERWIGID[ 26] = 203 ## HIGGSL0
andy@48 525 PDGID2HERWIGID[ 35] = 204 ## HIGGSH0
andy@48 526 PDGID2HERWIGID[ 36] = 205 ## HIGGSA0
andy@48 527 PDGID2HERWIGID[ 37] = 206 ## HIGGS+
andy@48 528 PDGID2HERWIGID[ -37] = 207 ## HIGGS-
andy@48 529 PDGID2HERWIGID[ 1000001] = 401 ## SSDLBR
andy@48 530 PDGID2HERWIGID[-1000001] = 407 ## SSDLBR
andy@48 531 PDGID2HERWIGID[ 1000002] = 402 ## SSULBR
andy@48 532 PDGID2HERWIGID[-1000002] = 408 ## SSUL
andy@48 533 PDGID2HERWIGID[ 1000003] = 403 ## SSSLBR
andy@48 534 PDGID2HERWIGID[-1000003] = 409 ## SSSL
andy@48 535 PDGID2HERWIGID[ 1000004] = 404 ## SSCLBR
andy@48 536 PDGID2HERWIGID[-1000004] = 410 ## SSCL
andy@48 537 PDGID2HERWIGID[ 1000005] = 405 ## SSB1BR
andy@48 538 PDGID2HERWIGID[-1000005] = 411 ## SSB1
andy@48 539 PDGID2HERWIGID[ 1000006] = 406 ## SST1BR
andy@48 540 PDGID2HERWIGID[-1000006] = 412 ## SST1
andy@48 541 PDGID2HERWIGID[ 2000001] = 413 ## SSDR
andy@48 542 PDGID2HERWIGID[-2000001] = 419 ## SSDRBR
andy@48 543 PDGID2HERWIGID[ 2000002] = 414 ## SSUR
andy@48 544 PDGID2HERWIGID[-2000002] = 420 ## SSURBR
andy@48 545 PDGID2HERWIGID[ 2000003] = 415 ## SSSR
andy@48 546 PDGID2HERWIGID[-2000003] = 421 ## SSSRBR
andy@48 547 PDGID2HERWIGID[ 2000004] = 416 ## SSCR
andy@48 548 PDGID2HERWIGID[-2000004] = 422 ## SSCRBR
andy@48 549 PDGID2HERWIGID[ 2000005] = 417 ## SSB2
andy@48 550 PDGID2HERWIGID[-2000005] = 423 ## SSB2BR
andy@48 551 PDGID2HERWIGID[ 2000006] = 418 ## SST2
andy@48 552 PDGID2HERWIGID[-2000006] = 424 ## SST2BR
andy@48 553 PDGID2HERWIGID[ 1000011] = 425 ## SSEL-
andy@48 554 PDGID2HERWIGID[-1000011] = 431 ## SSEL+
andy@48 555 PDGID2HERWIGID[ 1000012] = 426 ## SSNUEL
andy@48 556 PDGID2HERWIGID[-1000012] = 432 ## SSNUELBR
andy@48 557 PDGID2HERWIGID[ 1000013] = 427 ## SSMUL-
andy@48 558 PDGID2HERWIGID[-1000013] = 433 ## SSMUL+
andy@48 559 PDGID2HERWIGID[ 1000014] = 428 ## SSNUMUL
andy@48 560 PDGID2HERWIGID[-1000014] = 434 ## SSNUMLBR
andy@48 561 PDGID2HERWIGID[ 1000015] = 429 ## SSTAU1-
andy@48 562 PDGID2HERWIGID[-1000015] = 435 ## SSTAU1+
andy@48 563 PDGID2HERWIGID[ 1000016] = 430 ## SSNUTL
andy@48 564 PDGID2HERWIGID[-1000016] = 436 ## SSNUTLBR
andy@48 565 PDGID2HERWIGID[ 2000011] = 437 ## SSEL-
andy@48 566 PDGID2HERWIGID[-2000011] = 443 ## SSEL+
andy@48 567 PDGID2HERWIGID[ 2000012] = 438 ## SSNUEL
andy@48 568 PDGID2HERWIGID[-2000012] = 444 ## SSNUELBR
andy@48 569 PDGID2HERWIGID[ 2000013] = 439 ## SSMUL-
andy@48 570 PDGID2HERWIGID[-2000013] = 445 ## SSMUL+
andy@48 571 PDGID2HERWIGID[ 2000014] = 440 ## SSNUMUL
andy@48 572 PDGID2HERWIGID[-2000014] = 446 ## SSNUMLBR
andy@48 573 PDGID2HERWIGID[ 2000015] = 441 ## SSTAU1-
andy@48 574 PDGID2HERWIGID[-2000015] = 447 ## SSTAU1+
andy@48 575 PDGID2HERWIGID[ 2000016] = 442 ## SSNUTL
andy@48 576 PDGID2HERWIGID[-2000016] = 448 ## SSNUTLBR
andy@48 577 PDGID2HERWIGID[ 1000021] = 449 ## GLUINO
andy@48 578 PDGID2HERWIGID[ 1000022] = 450 ## NTLINO1
andy@48 579 PDGID2HERWIGID[ 1000023] = 451 ## NTLINO2
andy@48 580 PDGID2HERWIGID[ 1000025] = 452 ## NTLINO3
andy@48 581 PDGID2HERWIGID[ 1000035] = 453 ## NTLINO4
andy@48 582 PDGID2HERWIGID[ 1000024] = 454 ## CHGINO1+
andy@48 583 PDGID2HERWIGID[-1000024] = 456 ## CHGINO1-
andy@48 584 PDGID2HERWIGID[ 1000037] = 455 ## CHGINO2+
andy@48 585 PDGID2HERWIGID[-1000037] = 457 ## CHGINO2-
andy@48 586 PDGID2HERWIGID[ 1000039] = 458 ## GRAVTINO
andy@48 587
andy@48 588 masses = blocks["MASS"].entries
andy@48 589
andy@48 590 ## Init output string
andy@48 591 out = ""
andy@48 592
andy@48 593 ## First write out masses section:
andy@48 594 ## Number of SUSY + top particles
andy@48 595 ## IDHW, RMASS(IDHW), RLTIM(IDHW)
andy@48 596 ## repeated for each particle
andy@48 597 ## IDHW is the HERWIG identity code.
andy@48 598 ## RMASS and RTLIM are the mass in GeV, and lifetime in seconds respectively.
andy@48 599 massout = ""
andy@48 600 for pid in masses.keys():
andy@48 601 lifetime = -1
andy@48 602 try:
andy@48 603 width = decays[pid].totalwidth
andy@48 604 if width and width > 0:
andy@48 605 lifetime = 1.0/(width * 1.51926778e24) ## lifetime in seconds == hbar/width in GeV
andy@48 606 except:
andy@48 607 pass
andy@48 608 massout += "%d %e %e\n" % (PDGID2HERWIGID.get(pid, pid), masses[pid], lifetime)
andy@48 609 out += "%d\n" % massout.count("\n")
andy@48 610 out += massout
andy@48 611
andy@48 612 assert(len(masses) == len(decays))
andy@48 613
andy@48 614 ## Next each particles decay modes together with their branching ratios and matrix element codes
andy@48 615 ## Number of decay modes for a given particle (IDK)
andy@48 616 ## IDK(*), BRFRAC(*), NME(*) & IDKPRD(1-5,*)
andy@48 617 ## repeated for each mode.
andy@48 618 ## Repeated for each particle.
andy@48 619 ## IDK is the HERWIG code for the decaying particle, BRFRAC is the branching ratio of
andy@48 620 ## the decay mode. NME is a code for the matrix element to be used, either from the
andy@48 621 ## SUSY elements or the main HERWIG MEs. IDKPRD are the HERWIG identity codes of the decay products.
andy@48 622 for i, pid in enumerate(decays.keys()):
andy@48 623 # if not decays.has_key(pid):
andy@48 624 # continue
andy@48 625 hwid = PDGID2HERWIGID.get(pid, pid)
andy@48 626 decayout = ""
andy@48 627 #decayout += "@@@@ %d %d %d\n" % (i, pid, hwid)
andy@48 628 for i_d, d in enumerate(decays[pid].decays):
andy@48 629 ## Skip decay if it has no branching ratio
andy@48 630 if ignorenobr and d.br == 0:
andy@48 631 continue
andy@71 632
andy@71 633 ## Identify decay matrix element to use
andy@59 634 ## From std HW docs, or from this pair:
andy@59 635 ## Two new matrix element codes have been added for these new decays:
andy@59 636 ## NME = 200 3 body top quark via charged Higgs
andy@59 637 ## 300 3 body R-parity violating gaugino and gluino decays
andy@71 638 nme = 0
andy@71 639 # TODO: Get correct condition for using ME 100... this guessed from some ISAWIG output
andy@71 640 if abs(pid) in (6, 12):
andy@71 641 nme = 100
andy@71 642 ## Extra SUSY MEs
andy@71 643 if len(d.ids) == 3:
andy@71 644 # TODO: How to determine the conditions for using 200 and 300 MEs? Enumeration of affected decays?
andy@71 645 pass
andy@71 646 decayout += "%d %e %d " % (hwid, d.br, nme)
andy@71 647
andy@71 648 def is_quark(pid):
andy@71 649 return (abs(pid) in range(1, 7))
andy@71 650
andy@71 651 def is_lepton(pid):
andy@71 652 return (abs(pid) in range(11, 17))
andy@71 653
andy@71 654 def is_squark(pid):
andy@71 655 if abs(pid) in range(1000001, 1000007):
andy@71 656 return True
andy@71 657 if abs(pid) in range(2000001, 2000007):
andy@71 658 return True
andy@71 659 return False
andy@71 660
andy@71 661 def is_slepton(pid):
andy@71 662 if abs(pid) in range(1000011, 1000017):
andy@71 663 return True
andy@71 664 if abs(pid) in range(2000011, 2000016, 2):
andy@71 665 return True
andy@71 666 return False
andy@71 667
andy@71 668 def is_gaugino(pid):
andy@71 669 if abs(pid) in range(1000022, 1000026):
andy@71 670 return True
andy@71 671 if abs(pid) in (1000035, 1000037):
andy@71 672 return True
andy@71 673 return False
andy@71 674
andy@71 675 def is_susy(pid):
andy@71 676 return (is_squark(pid) or is_slepton(pid) or is_gaugino(pid) or pid == 1000021)
andy@71 677
andy@71 678 absids = map(abs, d.ids)
andy@71 679
andy@66 680 ## Order decay products as required by HERWIG
andy@66 681 ## Top
andy@66 682 if abs(pid) == 6:
andy@66 683 def cmp_bottomlast(a, b):
andy@66 684 """Comparison function which always puts b/bbar last"""
andy@66 685 if abs(a) == 5:
andy@66 686 return True
andy@71 687 if abs(b) == 5:
andy@66 688 return False
andy@66 689 return cmp(a, b)
andy@66 690 if len(absids) == 2:
andy@66 691 ## 2 body mode, to Higgs: Higgs; Bottom
andy@66 692 if (25 in absids or 26 in absids) and 5 in absids:
andy@66 693 d.ids = sorted(d.ids, key=cmp_bottomlast)
andy@66 694 elif len(absids) == 3:
andy@66 695 ## 3 body mode, via charged Higgs/W: quarks or leptons from W/Higgs; Bottom
andy@66 696 if 37 in absids or 23 in absids:
andy@66 697 d.ids = sorted(d.ids, key=cmp_bottomlast)
andy@66 698 ## Gluino
andy@66 699 elif abs(pid) == 1000021:
andy@66 700 if len(absids) == 2:
andy@66 701 ## 2 body mode
andy@66 702 ## without gluon: any order
andy@66 703 ## with gluon: gluon; colour neutral
andy@66 704 if 21 in absids:
andy@66 705 def cmp_gluonfirst(a, b):
andy@66 706 """Comparison function which always puts gluon first"""
andy@66 707 if a == 21:
andy@66 708 return False
andy@71 709 if b == 21:
andy@66 710 return True
andy@66 711 return cmp(a, b)
andy@66 712 d.ids = sorted(d.ids, key=cmp_gluonfirst)
andy@66 713 elif len(absids) == 3:
andy@66 714 ## 3-body modes, R-parity conserved: colour neutral; q or qbar
andy@70 715 def cmp_quarkslast(a, b):
andy@70 716 """Comparison function which always puts quarks last"""
andy@71 717 if is_quark(a):
andy@70 718 return True
andy@71 719 if is_quark(b):
andy@71 720 return False
andy@71 721 return cmp(a, b)
andy@71 722 d.ids = sorted(d.ids, key=cmp_quarkslast)
andy@71 723 ## Squark/Slepton
andy@71 724 elif is_squark(pid) or is_slepton(pid):
andy@73 725 def cmp_susy_quark_lepton(a, b):
andy@71 726 if is_susy(a):
andy@71 727 return False
andy@71 728 if is_susy(b):
andy@71 729 return True
andy@71 730 if is_quark(a):
andy@71 731 return False
andy@71 732 if is_quark(b):
andy@71 733 return True
andy@71 734 return cmp(a, b)
andy@71 735 ## 2 body modes: Gaugino/Gluino with Quark/Lepton Gaugino quark
andy@71 736 ## Gluino lepton
andy@71 737 ## 3 body modes: Weak sparticle particles from W decay
andy@71 738 ## Squark
andy@71 739 ## 2 body modes: Lepton Number Violated quark lepton
andy@71 740 ## Baryon number violated quark quark
andy@71 741 ## Slepton
andy@71 742 ## 2 body modes: Lepton Number Violated q or qbar
andy@71 743 d.ids = sorted(d.ids, key=cmp_bottomlast)
andy@71 744 ## Higgs
andy@71 745 elif pid in (25, 26):
andy@71 746 # TODO: Includes SUSY Higgses?
andy@71 747 ## Higgs
andy@71 748 ## 2 body modes: (s)quark-(s)qbar (s)q or (s)qbar
andy@71 749 ## (s)lepton-(s)lepton (s)l or (s)lbar
andy@71 750 ## 3 body modes: colour neutral q or qbar
andy@71 751 if len(absids) == 3:
andy@71 752 def cmp_quarkslast(a, b):
andy@71 753 """Comparison function which always puts quarks last"""
andy@71 754 if is_quark(a):
andy@71 755 return True
andy@71 756 if is_quark(b):
andy@71 757 return False
andy@71 758 return cmp(a, b)
andy@71 759 d.ids = sorted(d.ids, key=cmp_quarkslast)
andy@71 760 elif is_gaugino(pid):
andy@71 761 # TODO: Is there actually anything to do here?
andy@71 762 ## Gaugino
andy@71 763 ## 2 body modes: Squark-quark q or sq
andy@71 764 ## Slepton-lepton l or sl
andy@71 765 ##
andy@71 766 ## 3 body modes: R-parity conserved colour neutral q or qbar
andy@71 767 ## l or lbar
andy@71 768 if len(absids) == 3:
andy@71 769 def cmp_quarkslast(a, b):
andy@71 770 """Comparison function which always puts quarks last"""
andy@71 771 if is_quark(a):
andy@71 772 return True
andy@71 773 if is_quark(b):
andy@70 774 return False
andy@70 775 return cmp(a, b)
andy@70 776 d.ids = sorted(d.ids, key=cmp_quarkslast)
andy@66 777
andy@71 778 # TODO: Gaugino/Gluino
andy@67 779 ## 3 body modes: R-parity violating: Particles in the same order as the R-parity violating superpotential
andy@66 780
andy@66 781 ## Pad out IDs list with zeros
andy@48 782 ids = [0,0,0,0,0]
andy@48 783 for i, pid in enumerate(d.ids):
andy@48 784 ids[i] = pid
andy@48 785 ids = map(str, ids)
andy@48 786 decayout += " ".join(ids) + "\n"
andy@48 787 decayout = "%d\n" % decayout.count("\n") + decayout
andy@48 788 out += decayout
andy@48 789
andy@48 790 ## Now the SUSY parameters
andy@48 791 ## TANB, ALPHAH:
andy@48 792 out += "%e %e\n" % (blocks["MINPAR"].entries[3], blocks["ALPHA"].entries)
andy@48 793 ## Neutralino mixing matrix
andy@48 794 nmix = blocks["NMIX"].entries
andy@48 795 for i in xrange(1, 5):
andy@48 796 out += "%e %e %e %e\n" % (nmix[i][1], nmix[i][2], nmix[i][3], nmix[i][4])
andy@48 797 ## Chargino mixing matrices V and U
andy@48 798 vmix = blocks["VMIX"].entries
andy@48 799 out += "%e %e %e %e\n" % (vmix[1][1], vmix[1][2], vmix[2][1], vmix[2][2])
andy@48 800 umix = blocks["UMIX"].entries
andy@48 801 out += "%e %e %e %e\n" % (umix[1][1], umix[1][2], umix[2][1], umix[2][2])
andy@48 802 # THETAT,THETAB,THETAL
andy@48 803 import math
andy@48 804 out += "%e %e %e\n" % (math.acos(blocks["STOPMIX"].entries[1][1]),
andy@48 805 math.acos(blocks["SBOTMIX"].entries[1][1]),
andy@48 806 math.acos(blocks["STAUMIX"].entries[1][1]))
andy@48 807 # ATSS,ABSS,ALSS
andy@48 808 out += "%e %e %e\n" % (blocks["AU"].entries[3][3],
andy@48 809 blocks["AD"].entries[3][3],
andy@48 810 blocks["AE"].entries[3][3])
andy@48 811 # MUSS == sign(mu)
andy@48 812 out += "%f\n" % blocks["MINPAR"].entries[4]
andy@48 813
andy@48 814 ## TODO: Handle RPV SUSY
andy@48 815
andy@48 816 return out
andy@48 817
andy@48 818
andy@48 819
andy@1 820 if __name__ == "__main__":
andy@1 821 import sys
andy@1 822 for a in sys.argv[1:]:
andy@35 823 if a.endswith(".isa"):
andy@35 824 blocks, decays = readISAWIGFile(a)
andy@35 825 else:
andy@35 826 blocks, decays = readSLHAFile(a)
andy@3 827
andy@5 828 for bname, b in sorted(blocks.iteritems()):
andy@5 829 print b
andy@5 830 print
andy@3 831
andy@47 832 print blocks.keys()
andy@47 833
andy@4 834 print blocks["MASS"].entries[25]
andy@6 835 print
andy@6 836
andy@6 837 for p in sorted(decays.values()):
andy@6 838 print p
andy@6 839 print
andy@29 840
andy@31 841 print writeSLHA(blocks, decays, ignorenobr=True)

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