tt.py

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# Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
 
from AthenaCommon import Logging
from ...parameters import powheg_atlas_common
from ..powheg_V2 import PowhegV2
from ..external import ExternalMadSpin
 

logger = Logging.logging.getLogger("PowhegControl")
 
 
class tt(PowhegV2):
    """! Default Powheg configuration for top-pair production.
 
    Create a configurable object with all applicable Powheg options.
 
    @author James Robinson  <james.robinson@cern.ch>
    """
 
    def __init__(self, base_directory, **kwargs):
        """! Constructor: all process options are set here.
 
        @param base_directory: path to PowhegBox code.
        @param kwargs          dictionary of arguments from Generate_tf.
        """
        super(tt, self).__init__(base_directory, "hvq", **kwargs)
 
        # Add algorithms to the sequence
        self.add_algorithm(ExternalMadSpin(process="generate p p > t t~ [QCD]"))
 
        # Add parameter validation functions
        self.validation_functions.append("validate_decays")
 
        
        self.allowed_decay_modes = ["t t~ > all", "t t~ > b j j b~ j j", "t t~ > b l+ vl b~ l- vl~", "t t~ > b emu+ vemu b~ emu- vemu~", "t t~ > semileptonic", "t t~ > undecayed"]
 
        # Add all keywords for this process, overriding defaults if required
        self.add_keyword("bmass_lhe")
        self.add_keyword("bornktmin", 5.0)
        self.add_keyword("bornonly")
        self.add_keyword("bornsuppfact")
        self.add_keyword("bornzerodamp")
        self.add_keyword("bottomthr")
        self.add_keyword("bottomthrpdf")
        self.add_keyword("btildeborn")
        self.add_keyword("btildecoll")
        self.add_keyword("btildereal")
        self.add_keyword("btildevirt")
        self.add_keyword("btlscalect")
        self.add_keyword("btlscalereal")
        self.add_keyword("charmthr")
        self.add_keyword("charmthrpdf")
        self.add_keyword("check_bad_st1")
        self.add_keyword("check_bad_st2")
        self.add_keyword("clobberlhe")
        self.add_keyword("cmass_lhe")
        self.add_keyword("colltest")
        self.add_keyword("compress_lhe")
        self.add_keyword("compress_upb")
        self.add_keyword("compute_rwgt")
        self.add_keyword("doublefsr")
        self.add_keyword("evenmaxrat")
        self.add_keyword("facscfact", self.default_scales[0])
        self.add_keyword("fastbtlbound")
        self.add_keyword("fixedgrid")
        self.add_keyword("fixedscale")
        self.add_keyword("flg_debug")
        self.add_keyword("foldcsi")
        self.add_keyword("foldphi")
        self.add_keyword("foldy")
        self.add_keyword("fullrwgt")
        self.add_keyword("fullrwgtmode")
        self.add_keyword("hdamp")
        self.add_keyword("hfact")
        self.add_keyword("icsimax")
        self.add_keyword("ih1")
        self.add_keyword("ih2")
        self.add_keyword("itmx1")
        self.add_keyword("itmx1rm")
        self.add_keyword("itmx2", 8)
        self.add_keyword("itmx2rm")
        self.add_keyword("iupperfsr")
        self.add_keyword("iupperisr")
        self.add_keyword("iymax")
        self.add_keyword("lhans1", self.default_PDFs)
        self.add_keyword("lhans2", self.default_PDFs)
        self.add_keyword("lhapdf6maxsets")
        self.add_keyword("lhrwgt_descr")
        self.add_keyword("lhrwgt_group_combine")
        self.add_keyword("lhrwgt_group_name")
        self.add_keyword("lhrwgt_id")
        self.add_keyword("LOevents")
        self.add_keyword("manyseeds")
        self.add_keyword("max_io_bufsize")
        self.add_keyword("maxseeds")
        self.add_keyword("minlo")
        self.add_keyword("mintupbratlim")
        self.add_keyword("mintupbxless")
        self.add_keyword("ncall1", 10000)
        self.add_keyword("ncall1rm")
        self.add_keyword("ncall2", 50000)
        self.add_keyword("ncall2rm")
        self.add_keyword("ncallfrominput")
        self.add_keyword("noevents")
        self.add_keyword("novirtual")
        self.add_keyword("nubound", 800000)
        self.add_keyword("olddij")
        self.add_keyword("par_2gsupp")
        self.add_keyword("par_diexp")
        self.add_keyword("par_dijexp")
        self.add_keyword("parallelstage")
        self.add_keyword("pdfreweight")
        self.add_keyword("ptsqmin")
        self.add_keyword("ptsupp")
        self.add_keyword("qmass", powheg_atlas_common.mass.t, name="mass_t", description="top quark mass in GeV")
        self.add_keyword("radregion")
        self.add_keyword("rand1")
        self.add_keyword("rand2")
        self.add_keyword("renscfact", self.default_scales[1])
        self.add_keyword("rwl_add")
        self.add_keyword("rwl_file")
        self.add_keyword("rwl_format_rwgt")
        self.add_keyword("rwl_group_events")
        self.add_keyword("semileptonic", hidden=True)
        self.add_keyword("skipextratests")
        self.add_keyword("smartsig")
        self.add_keyword("softtest")
        self.add_keyword("stage2init")
        self.add_keyword("storeinfo_rwgt")
        self.add_keyword("storemintupb")
        self.add_keyword("tdec/bmass")
        self.add_keyword("tdec/cmass")
        self.add_keyword("tdec/dmass")
        self.add_keyword("tdec/elbranching")
        self.add_keyword("tdec/emass")
        self.add_keyword("tdec/mumass")
        self.add_keyword("tdec/sin2cabibbo")
        self.add_keyword("tdec/smass")
        self.add_keyword("tdec/taumass")
        self.add_keyword("tdec/twidth")
        self.add_keyword("tdec/umass")
        self.add_keyword("tdec/wmass")
        self.add_keyword("tdec/wwidth")
        self.add_keyword("testplots")
        self.add_keyword("testsuda")
        self.add_keyword("topdecaymode", self.allowed_decay_modes[0], name="decay_mode")
        self.add_keyword("ubexcess_correct")
        self.add_keyword("ubsigmadetails")
        self.add_keyword("use-old-grid")
        self.add_keyword("use-old-ubound")
        self.add_keyword("withdamp")
        self.add_keyword("withnegweights")
        self.add_keyword("withsubtr")
        self.add_keyword("xgriditeration")
        self.add_keyword("xupbound", 10)
 
    def validate_decays(self):
        """! Validate semileptonic and topdecaymode keywords."""
        self.expose()  # convenience call to simplify syntax
        if self.decay_mode not in self.allowed_decay_modes:
            logger.warning("Decay mode {} not recognised!".format(self.decay_mode))
            raise ValueError("Decay mode {} not recognised!".format(self.decay_mode))
        # Let MadSpin know whether tops have been decayed
        if "undecayed" in self.decay_mode:
            list(self.externals["MadSpin"].parameters_by_keyword("powheg_top_decays_enabled"))[0].value = False
        # Calculate appropriate decay mode numbers
        __decay_mode_lookup = {"t t~ > all": "22222", "t t~ > b j j b~ j j": "00022", "t t~ > b l+ vl b~ l- vl~": "22200", "t t~ > b emu+ vemu b~ emu- vemu~": "22000", "t t~ > semileptonic": "11111", "t t~ > undecayed": "00000"}
        list(self.parameters_by_keyword("topdecaymode"))[0].value = __decay_mode_lookup[self.decay_mode]
        if self.decay_mode == "t t~ > semileptonic":
            list(self.parameters_by_keyword("semileptonic"))[0].value = 1