pyslha.py

Sun, 26 Sep 2010 23:05:13 +0100

author
Andy Buckley <andy@insectnation.org>
date
Sun, 26 Sep 2010 23:05:13 +0100
changeset 59
def024f5c406
parent 57
5dca7fe40267
child 64
279a1614bca4
permissions
-rw-r--r--

Adding ordering/ME instructions from the web page

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@52 14 TODOs:
andy@52 15 * What to do about unlisted PIDs?
andy@52 16 * Split writeSLHA into writeSLHA{Blocks,Decays}
andy@52 17 * Handle SLHA2
andy@52 18 * Handle RPV SUSY in ISAWIG
andy@52 19 * Identify HERWIG decay matrix element to use in ISAWIG
andy@52 20 * Order decay products as required by HERWIG in ISAWIG
andy@8 21 """
andy@8 22
andy@8 23 from __future__ import with_statement
andy@26 24
andy@8 25 __author__ = "Andy Buckley <andy.buckley@cern.ch"
andy@57 26 __version__ = "0.3.0"
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@21 159 with open(spcfilename, "r") as f:
andy@31 160 return readSLHA(f.read(), kwargs)
andy@21 161
andy@21 162
andy@31 163 def readSLHA(spcstr, ignorenobr=False):
andy@21 164 """
andy@31 165 Read an SLHA definition from a string, returning dictionaries of blocks and
andy@31 166 decays.
andy@31 167
andy@31 168 If the ignorenobr parameter is True, do not store decay entries with a
andy@31 169 branching ratio of zero.
andy@21 170 """
andy@1 171 blocks = {}
andy@1 172 decays = {}
andy@21 173 #
andy@34 174 import re
andy@21 175 currentblock = None
andy@21 176 currentdecay = None
andy@21 177 for line in spcstr.splitlines():
andy@21 178 ## Handle (ignore) comment lines
andy@21 179 if line.startswith("#"):
andy@21 180 continue
andy@21 181 if "#" in line:
andy@21 182 line = line[:line.index("#")]
andy@21 183
andy@21 184 ## Handle BLOCK/DECAY start lines
andy@21 185 if line.upper().startswith("BLOCK"):
andy@47 186 #print line
andy@47 187 match = re.match(r"BLOCK\s+(\w+)(\s+Q=\s*.+)?", line.upper())
andy@21 188 if not match:
andy@8 189 continue
andy@21 190 blockname = match.group(1)
andy@21 191 qstr = match.group(2)
andy@21 192 if qstr is not None:
andy@21 193 qstr = qstr[2:].strip()
andy@21 194 currentblock = blockname
andy@21 195 currentdecay = None
andy@21 196 blocks[blockname] = Block(blockname, q=qstr)
andy@21 197 elif line.upper().startswith("DECAY"):
andy@21 198 match = re.match(r"DECAY\s+(\d+)\s+([\d\.E+-]+).*", line.upper())
andy@21 199 if not match:
andy@21 200 continue
andy@21 201 pdgid = int(match.group(1))
andy@21 202 width = float(match.group(2))
andy@21 203 currentblock = "DECAY"
andy@21 204 currentdecay = pdgid
andy@21 205 decays[pdgid] = Particle(pdgid, width)
andy@21 206 else:
andy@21 207 ## In-block line
andy@21 208 if currentblock is not None:
andy@21 209 items = line.split()
andy@21 210 if len(items) < 1:
andy@6 211 continue
andy@21 212 if currentblock != "DECAY":
andy@21 213 if len(items) < 2:
andy@21 214 ## Treat the ALPHA block differently
andy@21 215 blocks[currentblock].value = _autotype(items[0])
andy@33 216 blocks[currentblock].entries = _autotype(items[0])
andy@8 217 else:
andy@21 218 blocks[currentblock].add_entry(items)
andy@21 219 else:
andy@21 220 br = float(items[0])
andy@21 221 nda = int(items[1])
andy@21 222 ids = map(int, items[2:])
andy@31 223 if br > 0.0 or not ignorenobr:
andy@31 224 decays[currentdecay].add_decay(br, nda, ids)
andy@1 225
andy@8 226 ## Try to populate Particle masses from the MASS block
andy@47 227 # print blocks.keys()
andy@47 228 try:
andy@47 229 for pid in blocks["MASS"].entries.keys():
andy@47 230 if decays.has_key(pid):
andy@47 231 decays[pid].mass = blocks["MASS"].entries[pid]
andy@47 232 except:
andy@47 233 raise Exception("No MASS block found, from which to populate particle masses")
andy@8 234
andy@1 235 return blocks, decays
andy@1 236
andy@1 237
andy@33 238 def readISAWIGFile(isafilename, **kwargs):
andy@33 239 """
andy@33 240 Read a spectrum definition from a file in the ISAWIG format, returning
andy@33 241 dictionaries of blocks and decays. While this is not an SLHA format, it is
andy@33 242 informally supported as a useful mechanism for converting ISAWIG spectra to
andy@33 243 SLHA.
andy@33 244
andy@33 245 Other keyword parameters are passed to readSLHA.
andy@33 246 """
andy@33 247 with open(isafilename, "r") as f:
andy@33 248 return readISAWIG(f.read(), kwargs)
andy@33 249
andy@33 250
andy@33 251 def readISAWIG(isastr, ignorenobr=False):
andy@33 252 """
andy@33 253 Read a spectrum definition from a string in the ISAWIG format, returning
andy@33 254 dictionaries of blocks and decays. While this is not an SLHA format, it is
andy@33 255 informally supported as a useful mechanism for converting ISAWIG spectra to
andy@33 256 SLHA.
andy@33 257
andy@33 258 ISAWIG parsing based on the HERWIG SUSY specification format, from
andy@33 259 http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/file.html
andy@33 260
andy@33 261 If the ignorenobr parameter is True, do not store decay entries with a
andy@33 262 branching ratio of zero.
andy@33 263 """
andy@33 264
andy@33 265 ## PDG MC ID codes mapped to HERWIG SUSY ID codes, based on
andy@33 266 ## http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/susycodes.html
andy@33 267 HERWIGID2PDGID = {}
andy@33 268 HERWIGID2PDGID[203] = 25 ## HIGGSL0
andy@33 269 HERWIGID2PDGID[204] = 35 ## HIGGSH0
andy@33 270 HERWIGID2PDGID[205] = 36 ## HIGGSA0
andy@33 271 HERWIGID2PDGID[206] = 37 ## HIGGS+
andy@33 272 HERWIGID2PDGID[207] = -37 ## HIGGS-
andy@33 273 HERWIGID2PDGID[401] = 1000001 ## SSDLBR
andy@33 274 HERWIGID2PDGID[407] = -1000001 ## SSDLBR
andy@33 275 HERWIGID2PDGID[402] = 1000002 ## SSULBR
andy@33 276 HERWIGID2PDGID[408] = -1000002 ## SSUL
andy@33 277 HERWIGID2PDGID[403] = 1000003 ## SSSLBR
andy@33 278 HERWIGID2PDGID[409] = -1000003 ## SSSL
andy@33 279 HERWIGID2PDGID[404] = 1000004 ## SSCLBR
andy@33 280 HERWIGID2PDGID[410] = -1000004 ## SSCL
andy@33 281 HERWIGID2PDGID[405] = 1000005 ## SSB1BR
andy@33 282 HERWIGID2PDGID[411] = -1000005 ## SSB1
andy@33 283 HERWIGID2PDGID[406] = 1000006 ## SST1BR
andy@33 284 HERWIGID2PDGID[412] = -1000006 ## SST1
andy@33 285 HERWIGID2PDGID[413] = 2000001 ## SSDR
andy@33 286 HERWIGID2PDGID[419] = -2000001 ## SSDRBR
andy@33 287 HERWIGID2PDGID[414] = 2000002 ## SSUR
andy@33 288 HERWIGID2PDGID[420] = -2000002 ## SSURBR
andy@33 289 HERWIGID2PDGID[415] = 2000003 ## SSSR
andy@33 290 HERWIGID2PDGID[421] = -2000003 ## SSSRBR
andy@33 291 HERWIGID2PDGID[416] = 2000004 ## SSCR
andy@33 292 HERWIGID2PDGID[422] = -2000004 ## SSCRBR
andy@33 293 HERWIGID2PDGID[417] = 2000005 ## SSB2
andy@33 294 HERWIGID2PDGID[423] = -2000005 ## SSB2BR
andy@33 295 HERWIGID2PDGID[418] = 2000006 ## SST2
andy@33 296 HERWIGID2PDGID[424] = -2000006 ## SST2BR
andy@33 297 HERWIGID2PDGID[425] = 1000011 ## SSEL-
andy@33 298 HERWIGID2PDGID[431] = -1000011 ## SSEL+
andy@33 299 HERWIGID2PDGID[426] = 1000012 ## SSNUEL
andy@33 300 HERWIGID2PDGID[432] = -1000012 ## SSNUELBR
andy@33 301 HERWIGID2PDGID[427] = 1000013 ## SSMUL-
andy@33 302 HERWIGID2PDGID[433] = -1000013 ## SSMUL+
andy@33 303 HERWIGID2PDGID[428] = 1000014 ## SSNUMUL
andy@33 304 HERWIGID2PDGID[434] = -1000014 ## SSNUMLBR
andy@33 305 HERWIGID2PDGID[429] = 1000015 ## SSTAU1-
andy@33 306 HERWIGID2PDGID[435] = -1000015 ## SSTAU1+
andy@33 307 HERWIGID2PDGID[430] = 1000016 ## SSNUTL
andy@33 308 HERWIGID2PDGID[436] = -1000016 ## SSNUTLBR
andy@33 309 HERWIGID2PDGID[437] = 2000011 ## SSEL-
andy@33 310 HERWIGID2PDGID[443] = -2000011 ## SSEL+
andy@33 311 HERWIGID2PDGID[438] = 2000012 ## SSNUEL
andy@33 312 HERWIGID2PDGID[444] = -2000012 ## SSNUELBR
andy@33 313 HERWIGID2PDGID[439] = 2000013 ## SSMUL-
andy@33 314 HERWIGID2PDGID[445] = -2000013 ## SSMUL+
andy@33 315 HERWIGID2PDGID[440] = 2000014 ## SSNUMUL
andy@33 316 HERWIGID2PDGID[446] = -2000014 ## SSNUMLBR
andy@33 317 HERWIGID2PDGID[441] = 2000015 ## SSTAU1-
andy@33 318 HERWIGID2PDGID[447] = -2000015 ## SSTAU1+
andy@33 319 HERWIGID2PDGID[442] = 2000016 ## SSNUTL
andy@33 320 HERWIGID2PDGID[448] = -2000016 ## SSNUTLBR
andy@33 321 HERWIGID2PDGID[449] = 1000021 ## GLUINO
andy@33 322 HERWIGID2PDGID[450] = 1000022 ## NTLINO1
andy@33 323 HERWIGID2PDGID[451] = 1000023 ## NTLINO2
andy@33 324 HERWIGID2PDGID[452] = 1000025 ## NTLINO3
andy@33 325 HERWIGID2PDGID[453] = 1000035 ## NTLINO4
andy@33 326 HERWIGID2PDGID[454] = 1000024 ## CHGINO1+
andy@33 327 HERWIGID2PDGID[456] = -1000024 ## CHGINO1-
andy@33 328 HERWIGID2PDGID[455] = 1000037 ## CHGINO2+
andy@33 329 HERWIGID2PDGID[457] = -1000037 ## CHGINO2-
andy@33 330 HERWIGID2PDGID[458] = 1000039 ## GRAVTINO
andy@33 331
andy@33 332 blocks = {}
andy@33 333 decays = {}
andy@35 334 LINES = isastr.splitlines()
andy@33 335
andy@33 336 def getnextvalidline():
andy@35 337 while LINES:
andy@35 338 s = LINES.pop(0).strip()
andy@33 339 ## Return None if EOF reached
andy@33 340 if len(s) == 0:
andy@33 341 continue
andy@33 342 ## Strip comments
andy@33 343 if "#" in s:
andy@33 344 s = s[:s.index("#")].strip()
andy@33 345 ## Return if non-empty
andy@33 346 if len(s) > 0:
andy@33 347 return s
andy@33 348
andy@34 349 def getnextvalidlineitems():
andy@34 350 return map(_autotype, getnextvalidline().split())
andy@34 351
andy@34 352 ## Populate MASS block and create decaying particle objects
andy@35 353 masses = Block("MASS")
andy@33 354 numentries = int(getnextvalidline())
andy@33 355 for i in xrange(numentries):
andy@34 356 hwid, mass, lifetime = getnextvalidlineitems()
andy@34 357 width = 1.0/(lifetime * 1.51926778e24) ## width in GeV == hbar/lifetime in seconds
andy@34 358 pdgid = HERWIGID2PDGID.get(hwid, hwid)
andy@34 359 masses.add_entry((pdgid, mass))
andy@34 360 decays[pdgid] = Particle(pdgid, width, mass)
andy@34 361 #print pdgid, mass, width
andy@34 362 blocks["MASS"] = masses
andy@33 363
andy@34 364 ## Populate decays
andy@34 365 for n in xrange(numentries):
andy@34 366 numdecays = int(getnextvalidline())
andy@34 367 for d in xrange(numdecays):
andy@40 368 #print n, numentries-1, d, numdecays-1
andy@34 369 decayitems = getnextvalidlineitems()
andy@34 370 hwid = decayitems[0]
andy@34 371 pdgid = HERWIGID2PDGID.get(hwid, hwid)
andy@34 372 br = decayitems[1]
andy@34 373 nme = decayitems[2]
andy@34 374 daughter_hwids = decayitems[3:]
andy@34 375 daughter_pdgids = []
andy@34 376 for hw in daughter_hwids:
andy@34 377 if hw != 0:
andy@34 378 daughter_pdgids.append(HERWIGID2PDGID.get(hw, hw))
andy@35 379 if not decays.has_key(pdgid):
andy@40 380 #print "Decay for unlisted particle %d, %d" % (hwid, pdgid)
andy@38 381 decays[pdgid] = Particle(pdgid)
andy@38 382 decays[pdgid].add_decay(br, len(daughter_pdgids), daughter_pdgids)
andy@33 383
andy@33 384
andy@34 385 ## Now the SUSY parameters
andy@34 386 TANB, ALPHAH = getnextvalidlineitems()
andy@34 387 blocks["MINPAR"] = Block("MINPAR")
andy@34 388 blocks["MINPAR"].add_entry((3, TANB))
andy@34 389 blocks["ALPHA"] = Block("ALPHA")
andy@34 390 blocks["ALPHA"].entries = ALPHAH
andy@34 391 #
andy@34 392 ## Neutralino mixing matrix
andy@34 393 blocks["NMIX"] = Block("NMIX")
andy@34 394 for i in xrange(1, 5):
andy@34 395 nmix_i = getnextvalidlineitems()
andy@34 396 for j, v in enumerate(nmix_i):
andy@34 397 blocks["NMIX"].add_entry((i, j+1, v))
andy@34 398 #
andy@34 399 ## Chargino mixing matrices V and U
andy@34 400 blocks["VMIX"] = Block("VMIX")
andy@34 401 vmix = getnextvalidlineitems()
andy@34 402 blocks["VMIX"].add_entry((1, 1, vmix[0]))
andy@34 403 blocks["VMIX"].add_entry((1, 2, vmix[1]))
andy@34 404 blocks["VMIX"].add_entry((2, 1, vmix[2]))
andy@34 405 blocks["VMIX"].add_entry((2, 2, vmix[3]))
andy@34 406 blocks["UMIX"] = Block("UMIX")
andy@34 407 umix = getnextvalidlineitems()
andy@34 408 blocks["UMIX"].add_entry((1, 1, umix[0]))
andy@34 409 blocks["UMIX"].add_entry((1, 2, umix[1]))
andy@34 410 blocks["UMIX"].add_entry((2, 1, umix[2]))
andy@34 411 blocks["UMIX"].add_entry((2, 2, umix[3]))
andy@34 412 #
andy@34 413 THETAT, THETAB, THETAL = getnextvalidlineitems()
andy@34 414 import math
andy@34 415 blocks["STOPMIX"] = Block("STOPMIX")
andy@34 416 blocks["STOPMIX"].add_entry((1, 1, math.cos(THETAT)))
andy@34 417 blocks["STOPMIX"].add_entry((1, 2, -math.sin(THETAT)))
andy@34 418 blocks["STOPMIX"].add_entry((2, 1, math.sin(THETAT)))
andy@34 419 blocks["STOPMIX"].add_entry((2, 2, math.cos(THETAT)))
andy@34 420 blocks["SBOTMIX"] = Block("SBOTMIX")
andy@34 421 blocks["SBOTMIX"].add_entry((1, 1, math.cos(THETAB)))
andy@34 422 blocks["SBOTMIX"].add_entry((1, 2, -math.sin(THETAB)))
andy@34 423 blocks["SBOTMIX"].add_entry((2, 1, math.sin(THETAB)))
andy@34 424 blocks["SBOTMIX"].add_entry((2, 2, math.cos(THETAB)))
andy@34 425 blocks["STAUMIX"] = Block("STAUMIX")
andy@34 426 blocks["STAUMIX"].add_entry((1, 1, math.cos(THETAL)))
andy@34 427 blocks["STAUMIX"].add_entry((1, 2, -math.sin(THETAL)))
andy@34 428 blocks["STAUMIX"].add_entry((2, 1, math.sin(THETAL)))
andy@34 429 blocks["STAUMIX"].add_entry((2, 2, math.cos(THETAL)))
andy@34 430 #
andy@34 431 ATSS, ABSS, ALSS = getnextvalidlineitems()
andy@34 432 blocks["AU"] = Block("AU")
andy@34 433 blocks["AU"].add_entry((3, 3, ATSS))
andy@34 434 blocks["AD"] = Block("AD")
andy@34 435 blocks["AD"].add_entry((3, 3, ABSS))
andy@34 436 blocks["AE"] = Block("AE")
andy@34 437 blocks["AE"].add_entry((3, 3, ALSS))
andy@34 438 #
andy@34 439 MUSS = getnextvalidlineitems()[0]
andy@34 440 blocks["MINPAR"].add_entry((4, MUSS))
andy@34 441 #
andy@34 442 return blocks, decays
andy@33 443
andy@21 444
andy@31 445 def writeSLHAFile(spcfilename, blocks, decays, **kwargs):
andy@29 446 """
andy@29 447 Write an SLHA file from the supplied blocks and decays dicts.
andy@31 448
andy@31 449 Other keyword parameters are passed to writeSLHA.
andy@29 450 """
andy@29 451 with open(spcfilename, "w") as f:
andy@31 452 f.write(writeSLHA(blocks, decays, kwargs))
andy@29 453
andy@29 454
andy@33 455 ## TODO: Split writeSLHA into writeSLHA{Blocks,Decays}
andy@33 456
andy@31 457 def writeSLHA(blocks, decays, ignorenobr=False):
andy@29 458 """
andy@29 459 Return an SLHA definition as a string, from the supplied blocks and decays dicts.
andy@29 460 """
andy@31 461 sep = " "
andy@29 462 out = ""
andy@30 463 def dict_hier_strs(d, s=""):
andy@30 464 if type(d) is dict:
andy@30 465 for k, v in sorted(d.iteritems()):
andy@31 466 for s2 in dict_hier_strs(v, s + sep + _autostr(k)):
andy@30 467 yield s2
andy@30 468 else:
andy@31 469 yield s + sep + _autostr(d)
andy@30 470 ## Blocks
andy@30 471 for bname, b in sorted(blocks.iteritems()):
andy@29 472 namestr = b.name
andy@29 473 if b.q is not None:
andy@29 474 namestr += " Q= %e" % b.q
andy@29 475 out += "BLOCK %s\n" % namestr
andy@30 476 for s in dict_hier_strs(b.entries):
andy@31 477 out += sep + s + "\n"
andy@29 478 out += "\n"
andy@30 479 ## Decays
andy@30 480 for pid, particle in sorted(decays.iteritems()):
andy@40 481 out += "DECAY %d %e\n" % (particle.pid, particle.totalwidth or -1)
andy@30 482 for d in sorted(particle.decays):
andy@31 483 if d.br > 0.0 or not ignorenobr:
andy@31 484 products_str = " ".join(map(str, d.ids))
andy@31 485 out += sep + "%e" % d.br + sep + "%d" % len(d.ids) + sep + products_str + "\n"
andy@29 486 out += "\n"
andy@29 487 return out
andy@29 488
andy@29 489
andy@29 490
andy@48 491 def writeISAWIGFile(isafilename, blocks, decays, **kwargs):
andy@48 492 """
andy@48 493 Write an ISAWIG file from the supplied blocks and decays dicts.
andy@48 494
andy@48 495 Other keyword parameters are passed to writeISAWIG.
andy@48 496
andy@48 497 TODO: Handle RPV SUSY
andy@48 498 """
andy@48 499 with open(isafilename, "w") as f:
andy@48 500 f.write(writeISAWIG(blocks, decays, kwargs))
andy@48 501
andy@48 502
andy@48 503 def writeISAWIG(blocks, decays, ignorenobr=False):
andy@48 504 """
andy@48 505 Return an ISAWIG definition as a string, from the supplied blocks and decays dicts.
andy@48 506
andy@48 507 ISAWIG parsing based on the HERWIG SUSY specification format, from
andy@48 508 http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/file.html
andy@48 509
andy@48 510 If the ignorenobr parameter is True, do not write decay entries with a
andy@48 511 branching ratio of zero.
andy@48 512 """
andy@48 513 ## PDG MC ID codes mapped to HERWIG SUSY ID codes, based on
andy@48 514 ## http://www.hep.phy.cam.ac.uk/~richardn/HERWIG/ISAWIG/susycodes.html
andy@48 515 PDGID2HERWIGID = {}
andy@48 516 PDGID2HERWIGID[ 25] = 203 ## HIGGSL0 (ADDED)
andy@48 517 PDGID2HERWIGID[ 26] = 203 ## HIGGSL0
andy@48 518 PDGID2HERWIGID[ 35] = 204 ## HIGGSH0
andy@48 519 PDGID2HERWIGID[ 36] = 205 ## HIGGSA0
andy@48 520 PDGID2HERWIGID[ 37] = 206 ## HIGGS+
andy@48 521 PDGID2HERWIGID[ -37] = 207 ## HIGGS-
andy@48 522 PDGID2HERWIGID[ 1000001] = 401 ## SSDLBR
andy@48 523 PDGID2HERWIGID[-1000001] = 407 ## SSDLBR
andy@48 524 PDGID2HERWIGID[ 1000002] = 402 ## SSULBR
andy@48 525 PDGID2HERWIGID[-1000002] = 408 ## SSUL
andy@48 526 PDGID2HERWIGID[ 1000003] = 403 ## SSSLBR
andy@48 527 PDGID2HERWIGID[-1000003] = 409 ## SSSL
andy@48 528 PDGID2HERWIGID[ 1000004] = 404 ## SSCLBR
andy@48 529 PDGID2HERWIGID[-1000004] = 410 ## SSCL
andy@48 530 PDGID2HERWIGID[ 1000005] = 405 ## SSB1BR
andy@48 531 PDGID2HERWIGID[-1000005] = 411 ## SSB1
andy@48 532 PDGID2HERWIGID[ 1000006] = 406 ## SST1BR
andy@48 533 PDGID2HERWIGID[-1000006] = 412 ## SST1
andy@48 534 PDGID2HERWIGID[ 2000001] = 413 ## SSDR
andy@48 535 PDGID2HERWIGID[-2000001] = 419 ## SSDRBR
andy@48 536 PDGID2HERWIGID[ 2000002] = 414 ## SSUR
andy@48 537 PDGID2HERWIGID[-2000002] = 420 ## SSURBR
andy@48 538 PDGID2HERWIGID[ 2000003] = 415 ## SSSR
andy@48 539 PDGID2HERWIGID[-2000003] = 421 ## SSSRBR
andy@48 540 PDGID2HERWIGID[ 2000004] = 416 ## SSCR
andy@48 541 PDGID2HERWIGID[-2000004] = 422 ## SSCRBR
andy@48 542 PDGID2HERWIGID[ 2000005] = 417 ## SSB2
andy@48 543 PDGID2HERWIGID[-2000005] = 423 ## SSB2BR
andy@48 544 PDGID2HERWIGID[ 2000006] = 418 ## SST2
andy@48 545 PDGID2HERWIGID[-2000006] = 424 ## SST2BR
andy@48 546 PDGID2HERWIGID[ 1000011] = 425 ## SSEL-
andy@48 547 PDGID2HERWIGID[-1000011] = 431 ## SSEL+
andy@48 548 PDGID2HERWIGID[ 1000012] = 426 ## SSNUEL
andy@48 549 PDGID2HERWIGID[-1000012] = 432 ## SSNUELBR
andy@48 550 PDGID2HERWIGID[ 1000013] = 427 ## SSMUL-
andy@48 551 PDGID2HERWIGID[-1000013] = 433 ## SSMUL+
andy@48 552 PDGID2HERWIGID[ 1000014] = 428 ## SSNUMUL
andy@48 553 PDGID2HERWIGID[-1000014] = 434 ## SSNUMLBR
andy@48 554 PDGID2HERWIGID[ 1000015] = 429 ## SSTAU1-
andy@48 555 PDGID2HERWIGID[-1000015] = 435 ## SSTAU1+
andy@48 556 PDGID2HERWIGID[ 1000016] = 430 ## SSNUTL
andy@48 557 PDGID2HERWIGID[-1000016] = 436 ## SSNUTLBR
andy@48 558 PDGID2HERWIGID[ 2000011] = 437 ## SSEL-
andy@48 559 PDGID2HERWIGID[-2000011] = 443 ## SSEL+
andy@48 560 PDGID2HERWIGID[ 2000012] = 438 ## SSNUEL
andy@48 561 PDGID2HERWIGID[-2000012] = 444 ## SSNUELBR
andy@48 562 PDGID2HERWIGID[ 2000013] = 439 ## SSMUL-
andy@48 563 PDGID2HERWIGID[-2000013] = 445 ## SSMUL+
andy@48 564 PDGID2HERWIGID[ 2000014] = 440 ## SSNUMUL
andy@48 565 PDGID2HERWIGID[-2000014] = 446 ## SSNUMLBR
andy@48 566 PDGID2HERWIGID[ 2000015] = 441 ## SSTAU1-
andy@48 567 PDGID2HERWIGID[-2000015] = 447 ## SSTAU1+
andy@48 568 PDGID2HERWIGID[ 2000016] = 442 ## SSNUTL
andy@48 569 PDGID2HERWIGID[-2000016] = 448 ## SSNUTLBR
andy@48 570 PDGID2HERWIGID[ 1000021] = 449 ## GLUINO
andy@48 571 PDGID2HERWIGID[ 1000022] = 450 ## NTLINO1
andy@48 572 PDGID2HERWIGID[ 1000023] = 451 ## NTLINO2
andy@48 573 PDGID2HERWIGID[ 1000025] = 452 ## NTLINO3
andy@48 574 PDGID2HERWIGID[ 1000035] = 453 ## NTLINO4
andy@48 575 PDGID2HERWIGID[ 1000024] = 454 ## CHGINO1+
andy@48 576 PDGID2HERWIGID[-1000024] = 456 ## CHGINO1-
andy@48 577 PDGID2HERWIGID[ 1000037] = 455 ## CHGINO2+
andy@48 578 PDGID2HERWIGID[-1000037] = 457 ## CHGINO2-
andy@48 579 PDGID2HERWIGID[ 1000039] = 458 ## GRAVTINO
andy@48 580
andy@48 581 masses = blocks["MASS"].entries
andy@48 582
andy@48 583 ## Init output string
andy@48 584 out = ""
andy@48 585
andy@48 586 ## First write out masses section:
andy@48 587 ## Number of SUSY + top particles
andy@48 588 ## IDHW, RMASS(IDHW), RLTIM(IDHW)
andy@48 589 ## repeated for each particle
andy@48 590 ## IDHW is the HERWIG identity code.
andy@48 591 ## RMASS and RTLIM are the mass in GeV, and lifetime in seconds respectively.
andy@48 592 massout = ""
andy@48 593 for pid in masses.keys():
andy@48 594 lifetime = -1
andy@48 595 try:
andy@48 596 width = decays[pid].totalwidth
andy@48 597 if width and width > 0:
andy@48 598 lifetime = 1.0/(width * 1.51926778e24) ## lifetime in seconds == hbar/width in GeV
andy@48 599 except:
andy@48 600 pass
andy@48 601 massout += "%d %e %e\n" % (PDGID2HERWIGID.get(pid, pid), masses[pid], lifetime)
andy@48 602 out += "%d\n" % massout.count("\n")
andy@48 603 out += massout
andy@48 604
andy@48 605 assert(len(masses) == len(decays))
andy@48 606
andy@48 607 ## Next each particles decay modes together with their branching ratios and matrix element codes
andy@48 608 ## Number of decay modes for a given particle (IDK)
andy@48 609 ## IDK(*), BRFRAC(*), NME(*) & IDKPRD(1-5,*)
andy@48 610 ## repeated for each mode.
andy@48 611 ## Repeated for each particle.
andy@48 612 ## IDK is the HERWIG code for the decaying particle, BRFRAC is the branching ratio of
andy@48 613 ## the decay mode. NME is a code for the matrix element to be used, either from the
andy@48 614 ## SUSY elements or the main HERWIG MEs. IDKPRD are the HERWIG identity codes of the decay products.
andy@48 615 for i, pid in enumerate(decays.keys()):
andy@48 616 # if not decays.has_key(pid):
andy@48 617 # continue
andy@48 618 hwid = PDGID2HERWIGID.get(pid, pid)
andy@48 619 decayout = ""
andy@48 620 #decayout += "@@@@ %d %d %d\n" % (i, pid, hwid)
andy@48 621 for i_d, d in enumerate(decays[pid].decays):
andy@48 622 ## Skip decay if it has no branching ratio
andy@48 623 if ignorenobr and d.br == 0:
andy@48 624 continue
andy@48 625 ## TODO: Identify decay matrix element to use
andy@59 626 ## From std HW docs, or from this pair:
andy@59 627 ## Two new matrix element codes have been added for these new decays:
andy@59 628 ## NME = 200 3 body top quark via charged Higgs
andy@59 629 ## 300 3 body R-parity violating gaugino and gluino decays
andy@59 630 ## How to determine which to use?
andy@48 631 #decayout += str(i_d + 1) + " "
andy@48 632 decayout += "%d %e 0 " % (hwid, d.br)
andy@48 633 ## TODO: Order decay products as required
andy@59 634 ## Decaying Particle Mode Order of Decay Products
andy@59 635 ## Top 2 body mode: to Higgs Higgs Bottom
andy@59 636 ## 3 body mode: via charged Higgs/W quarks or leptons from W/Higgs Bottom
andy@59 637 ## Gluino 2 body modes: without gluon Any Order
andy@59 638 ## with gluon gluon colour neutral
andy@59 639 ## 3-body modes: Rparity conserved colour neutral q or qbar
andy@59 640 ## Squark/Slepton 2 body modes: Gaugino/Gluino with Quark/Lepton Gaugino quark
andy@59 641 ## Gluino lepton
andy@59 642 ## 3 body modes: Weak sparticle particles from W decay
andy@59 643 ## Squark 2 body modes: Lepton Number Violated quark lepton
andy@59 644 ## baryon number violated quark quark
andy@59 645 ## Slepton 2 body modes: Lepton Number Violated q or qbar
andy@59 646 ## Higgs 2 body modes: (s)quark-(s)qbar (s)q or (s)qbar
andy@59 647 ## (s)lepton-(s)lepton (s)l or (s)lbar
andy@59 648 ## 3 body modes: colour neutral q or qbar
andy@59 649 ## l or lbar
andy@59 650 ## Gaugino 2 body modes: squark-quark q or sq
andy@59 651 ## slepton-lepton l or sl
andy@59 652 ## 3 body modes: R-parity conserved colour neutral q or qbar
andy@59 653 ## l or lbar
andy@59 654 ## Gaugino/Gluino 3 body modes: R-parity violating Particles in the same order as the R-parity violating superpotential
andy@48 655 ids = [0,0,0,0,0]
andy@48 656 for i, pid in enumerate(d.ids):
andy@48 657 ids[i] = pid
andy@48 658 ids = map(str, ids)
andy@48 659 decayout += " ".join(ids) + "\n"
andy@48 660 decayout = "%d\n" % decayout.count("\n") + decayout
andy@48 661 out += decayout
andy@48 662
andy@48 663 ## Now the SUSY parameters
andy@48 664 ## TANB, ALPHAH:
andy@48 665 out += "%e %e\n" % (blocks["MINPAR"].entries[3], blocks["ALPHA"].entries)
andy@48 666 ## Neutralino mixing matrix
andy@48 667 nmix = blocks["NMIX"].entries
andy@48 668 for i in xrange(1, 5):
andy@48 669 out += "%e %e %e %e\n" % (nmix[i][1], nmix[i][2], nmix[i][3], nmix[i][4])
andy@48 670 ## Chargino mixing matrices V and U
andy@48 671 vmix = blocks["VMIX"].entries
andy@48 672 out += "%e %e %e %e\n" % (vmix[1][1], vmix[1][2], vmix[2][1], vmix[2][2])
andy@48 673 umix = blocks["UMIX"].entries
andy@48 674 out += "%e %e %e %e\n" % (umix[1][1], umix[1][2], umix[2][1], umix[2][2])
andy@48 675 # THETAT,THETAB,THETAL
andy@48 676 import math
andy@48 677 out += "%e %e %e\n" % (math.acos(blocks["STOPMIX"].entries[1][1]),
andy@48 678 math.acos(blocks["SBOTMIX"].entries[1][1]),
andy@48 679 math.acos(blocks["STAUMIX"].entries[1][1]))
andy@48 680 # ATSS,ABSS,ALSS
andy@48 681 out += "%e %e %e\n" % (blocks["AU"].entries[3][3],
andy@48 682 blocks["AD"].entries[3][3],
andy@48 683 blocks["AE"].entries[3][3])
andy@48 684 # MUSS == sign(mu)
andy@48 685 out += "%f\n" % blocks["MINPAR"].entries[4]
andy@48 686
andy@48 687 ## TODO: Handle RPV SUSY
andy@48 688
andy@48 689 return out
andy@48 690
andy@48 691
andy@48 692
andy@1 693 if __name__ == "__main__":
andy@1 694 import sys
andy@1 695 for a in sys.argv[1:]:
andy@35 696 if a.endswith(".isa"):
andy@35 697 blocks, decays = readISAWIGFile(a)
andy@35 698 else:
andy@35 699 blocks, decays = readSLHAFile(a)
andy@3 700
andy@5 701 for bname, b in sorted(blocks.iteritems()):
andy@5 702 print b
andy@5 703 print
andy@3 704
andy@47 705 print blocks.keys()
andy@47 706
andy@4 707 print blocks["MASS"].entries[25]
andy@6 708 print
andy@6 709
andy@6 710 for p in sorted(decays.values()):
andy@6 711 print p
andy@6 712 print
andy@29 713
andy@31 714 print writeSLHA(blocks, decays, ignorenobr=True)

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