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fourtops.py
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1# Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
2
3from ... import Logging
4from ...parameters import powheg_atlas_common
5from ..powheg_V2 import PowhegV2
6from ..external import ExternalMadSpin
7
8
9logger = Logging.logging.getLogger("PowhegControl")
10
11
12# Dictionary to convert the PowhegControl decay mode names to the appropriate
13# decay mode numbers understood by Powheg
14_decay_mode_lookup = {
15 "t t~ t t~ > all [MadSpin]" : "00000", # switch off decays in Powheg and let MadSpin handle them!
16 "t t~ t t~ > all": "44444", # all decays
17 "t t~ t t~ > 4l": "44400", # exactly 4 leptons
18 "t t~ t t~ > 3l4l": "4", # at least 3 leptons
19 "t t~ t t~ > 2lSS": "3", # exactly 2 leptons, same sign
20 "t t~ t t~ > 2lOS": "2", # exactly 2 leptons, opposite sign
21 "t t~ t t~ > 1l": "1", # exactly 1 lepton
22 "t t~ t t~ > allhad": "00044", # fully-hadronic
23 "t t~ t t~ > undecayed": "00000" # undecayed (e.g. to produce a lhe file)
24 }
25_signature_lookup = [ "4", "3", "2", "1" ] # these values are for the 4tops-specific #decay_signature keyword
26
27class fourtops(PowhegV2):
28 """! Default Powheg configuration for 4 tops production.
29
30 Create a configurable object with all applicable Powheg options.
31
32 @author James Robinson <tpelzer@cern.ch>
33 """
34
35 def __init__(self, base_directory, **kwargs):
36 """! Constructor: all process options are set here.
37
38 @param base_directory: path to PowhegBox code.
39 @param kwargs dictionary of arguments from Generate_tf.
40 """
41 super(fourtops, self).__init__(base_directory, "fourtops", **kwargs)
42
43 # Add algorithms to the sequence
44 self.add_algorithm(ExternalMadSpin(process="generate p p > t t~ t t~ [QCD]"))
45
46 # Add parameter validation functions
47 self.validation_functions.append("validate_decays")
48
49 # List of allowed decay modes
50 # (The sorting of the list is just to increase readability when it's printed)
51 self.allowed_decay_modes = sorted(_decay_mode_lookup.keys())
52
53 # Add all keywords for this process, overriding defaults if required
54 self.add_keyword("bmass_lhe")
55 self.add_keyword("bornktmin", 5.0)
56 self.add_keyword("bornonly")
57 self.add_keyword("bornsuppfact")
58 self.add_keyword("bornzerodamp")
59 self.add_keyword("bottomthr")
60 self.add_keyword("bottomthrpdf")
61 self.add_keyword("btildeborn")
62 self.add_keyword("btildecoll")
63 self.add_keyword("btildereal")
64 self.add_keyword("btildevirt")
65 self.add_keyword("btlscalect")
66 self.add_keyword("btlscalereal")
67 self.add_keyword("charmthr")
68 self.add_keyword("charmthrpdf")
69 self.add_keyword("check_bad_st1")
70 self.add_keyword("check_bad_st2")
71 self.add_keyword("clobberlhe")
72 self.add_keyword("cmass_lhe")
73 self.add_keyword("colltest")
74 self.add_keyword("compress_lhe")
75 self.add_keyword("compress_upb")
76 self.add_keyword("compute_rwgt")
77 self.add_keyword("correlations", 1)
78 self.add_keyword("dampscfact", 1.0)
79 self.add_keyword("decay_signature", "0")
80 self.add_keyword("doublefsr")
81 self.add_keyword("dynamic_hdamp", 1)
82 self.add_keyword("evenmaxrat")
83 self.add_keyword("ewborn")
84 self.add_keyword("facscfact", self.default_scales[0])
85 self.add_keyword("fastbtlbound")
86 self.add_keyword("fixedgrid")
87 self.add_keyword("fixedscale")
88 self.add_keyword("flg_debug")
89 self.add_keyword("foldcsi")
90 self.add_keyword("foldphi")
91 self.add_keyword("foldy")
92 self.add_keyword("fullrwgt")
93 self.add_keyword("fullrwgtmode")
94 self.add_keyword("hbzd", 5.0)
95 self.add_keyword("hdamp")
96 self.add_keyword("hfact")
97 self.add_keyword("icsimax")
98 self.add_keyword("ih1")
99 self.add_keyword("ih2")
100 self.add_keyword("itmx1")
101 self.add_keyword("itmx1rm")
102 self.add_keyword("itmx2", 8)
103 self.add_keyword("itmx2rm")
104 self.add_keyword("iupperfsr")
105 self.add_keyword("iupperisr")
106 self.add_keyword("iymax")
107 self.add_keyword("lhans1", self.default_PDFs)
108 self.add_keyword("lhans2", self.default_PDFs)
109 self.add_keyword("lhapdf6maxsets")
110 self.add_keyword("lhrwgt_descr")
111 self.add_keyword("lhrwgt_group_combine")
112 self.add_keyword("lhrwgt_group_name")
113 self.add_keyword("lhrwgt_id")
114 self.add_keyword("LOevents")
115 self.add_keyword("manyseeds")
116 self.add_keyword("max_io_bufsize")
117 self.add_keyword("maxseeds")
118 self.add_keyword("minlo")
119 self.add_keyword("mintupbratlim")
120 self.add_keyword("mintupbxless")
121 self.add_keyword("ncall1", 10000)
122 self.add_keyword("ncall1rm")
123 self.add_keyword("ncall2", 50000)
124 self.add_keyword("ncall2rm")
125 self.add_keyword("ncallfrominput")
126 self.add_keyword("noevents")
127 self.add_keyword("novirtual")
128 self.add_keyword("nubound", 800000)
129 self.add_keyword("olddij")
130 self.add_keyword("par_2gsupp")
131 self.add_keyword("par_diexp")
132 self.add_keyword("par_dijexp")
133 self.add_keyword("parallelstage")
134 self.add_keyword("pdfreweight")
135 self.add_keyword("ptsqmin")
136 self.add_keyword("ptsupp")
137 self.add_keyword("tmass", powheg_atlas_common.mass.t, name="mass_t", description="top quark mass in GeV")
138 self.add_keyword("radregion")
139 self.add_keyword("rand1")
140 self.add_keyword("rand2")
141 self.add_keyword("renscfact", self.default_scales[1])
142 self.add_keyword("rwl_add")
143 self.add_keyword("rwl_file")
144 self.add_keyword("rwl_format_rwgt")
145 self.add_keyword("rwl_group_events")
146 self.add_keyword("scalechoice", 1)
147 self.add_keyword("skipextratests")
148 self.add_keyword("smartsig")
149 self.add_keyword("softtest")
150 self.add_keyword("stage2init")
151 self.add_keyword("storeinfo_rwgt")
152 self.add_keyword("storemintupb")
153 self.add_keyword("tdec/bmass")
154 self.add_keyword("tdec/cmass")
155 self.add_keyword("tdec/dmass")
156 self.add_keyword("tdec/elbranching")
157 self.add_keyword("tdec/emass")
158 self.add_keyword("tdec/mumass")
159 self.add_keyword("tdec/sin2cabibbo")
160 self.add_keyword("tdec/smass")
161 self.add_keyword("tdec/taumass")
162 self.add_keyword("tdec/twidth")
163 self.add_keyword("tdec/umass")
164 self.add_keyword("tdec/wmass")
165 self.add_keyword("tdec/wwidth")
166 self.add_keyword("testplots")
167 self.add_keyword("testsuda")
168 self.add_keyword("topdecaymode", "t t~ t t~ > all", name="decay_mode")
169 self.add_keyword("ubexcess_correct")
170 self.add_keyword("ubsigmadetails")
171 self.add_keyword("use-old-grid")
172 self.add_keyword("use-old-ubound")
173 self.add_keyword("withdamp")
174 self.add_keyword("withnegweights")
175 self.add_keyword("withsubtr")
176 self.add_keyword("xgriditeration")
177 self.add_keyword("xupbound", 10)
178
179 def validate_decays(self):
180 """
181 Validate semileptonic and topdecaymode keywords and translate them from ATLAS input to Powheg input
182 """
183 self.expose() # convenience call to simplify syntax
184 if self.decay_mode not in self.allowed_decay_modes:
185 error_message = "Decay mode '{given}' not recognised, valid choices are: '{choices}'!".format(given=self.decay_mode, choices="', '".join(self.allowed_decay_modes))
186 logger.warning(error_message)
187 raise ValueError(error_message)
188
189 # Check if MadSpin decays are requested.
190 # Accordingly, MadSpin will run or not run.
191 if "MadSpin" in self.decay_mode:
192 self.externals["MadSpin"].parameters_by_keyword("powheg_top_decays_enabled")[0].value = False
193 self.externals["MadSpin"].parameters_by_keyword("MadSpin_model")[0].value = "loop_sm-no_b_mass"
194 self.externals["MadSpin"].parameters_by_keyword("MadSpin_nFlavours")[0].value = 5
195
196 if _decay_mode_lookup[self.decay_mode] in _signature_lookup: # special handling of decays with #decay_signature keyword
197 self.parameters_by_keyword("decay_signature")[0].value = _decay_mode_lookup[self.decay_mode]
198 self.parameters_by_keyword("topdecaymode")[0].value = "44444"
199 else: # usual handling of decays with #topdecaymode keyword
200 self.parameters_by_keyword("decay_signature")[0].value = "0"
201 self.parameters_by_keyword("topdecaymode")[0].value = _decay_mode_lookup[self.decay_mode]
python.processes.configurable.Configurable.add_keyword
add_keyword(self, keyword, value=None, name=None, frozen=None, hidden=None, description=None, **kwargs)
Register configurable parameter that is exposed to the user.
Definition configurable.py:21
python.processes.configurable.Configurable.expose
expose(self)
Add all names to the interface of this object.
Definition configurable.py:46
python.processes.configurable.Configurable.parameters_by_keyword
parameters_by_keyword(self, keyword)
Retrieve all parameters that use a given keyword.
Definition configurable.py:57
python.processes.external.external_madspin.ExternalMadSpin
Class for running external MadSpin process.
Definition external_madspin.py:11
python.processes.powheg.fourtops.fourtops
Default Powheg configuration for 4 tops production.
Definition fourtops.py:27
python.processes.powheg.fourtops.fourtops.__init__
__init__(self, base_directory, **kwargs)
Constructor: all process options are set here.
Definition fourtops.py:35
python.processes.powheg_V2.PowhegV2
Base class for PowhegBox V2 processes.
Definition powheg_V2.py:6
python.processes.powheg_base.PowhegBase.externals
dict externals
List of external processes to schedule.
Definition powheg_base.py:124
python.processes.powheg_base.PowhegBase.validation_functions
list validation_functions
List of validation functions to run before preparing runcard.
Definition powheg_base.py:127
python.processes.powheg_base.PowhegBase.add_algorithm
add_algorithm(self, alg_or_process)
Add an algorithm or external process to the sequence.
Definition powheg_base.py:156
python.processes.powheg_base.PowhegBase.default_scales
default_scales(self)
Default scale variations for this process.
Definition powheg_base.py:194
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