Changes between Version 3 and Version 4 of chargedHiggs


Ignore:
Timestamp:
Nov 28, 2016, 4:17:51 PM (9 years ago)
Author:
Marius Wiesemann
Comment:

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  • chargedHiggs

    v3 v4  
    2626This page contains instructions how to use the NLO predictions for charged Higgs production in the intermediate mass range and combine them with event generation at LO.
    2727
    28 '''Authors :  Celine Degrande, Maria Ubiali, Marius Wiesemann, Marco Zaro'''
     28'''Authors :  Celine Degrande, Rikkert Frederix, Valentin Hirschi, Maria Ubiali, Marius Wiesemann, Marco Zaro'''
    2929
    3030----
    … …  
    3939''Instructions:''
    4040
     41The best we can do currently to model a charged Higgs signal in the intermediate mass range for this involved process (pp > b b H W) is to use the available NLO predictions for the total cross section and combine them with event generation at LO.
    4142
     431) The state-of-the-art NLO predictions in the intermediate mass range, excluding contributions from scalar Higgses, can be downloaded for tan(beta) values of 0.1 to 60 for both type I and type II 2HDMs from the [https://twiki.cern.ch/twiki/bin/view/LHCPhysics/LHCHXSWGMSSMCharged#Intermediate_mass_145_200_GeV_ch twiki page of the LHCHXSWG (charged Higgs subgroup)]
     44
     452) Generate the process at LO without neutral Higgses to compute dσ,,LO,,^no-neutral^. Use the model file attached to this page (2HDMtypeIIymbMSbar.tar) and extract it into the models folder.[[BR]]
     46 __details how to generate it with MG5_aMC:__[[BR]]
     47 MG5_aMC>import model 2HDMtypeIIymbMSbar[[BR]]
     48 MG5_aMC>generate p p > h+ w- b b~ / h1 h2 h3[[BR]]
     49 MG5_aMC>output HWbb_no-neutral[[BR]]
     50 MG5_aMC>exit[[BR]]
     51
     52 The parameters in the cards should be chosen according to the LHC Higgs cross section working group recommendations.
     53
     54
     553) Generate the process at LO including neutral Higgses to compute dσ,,LO,,^with-neutral^[[BR]]
     56 __details how to generate it with MG5_aMC:__[[BR]]
     57 MG5_aMC>import model 2HDMtypeIIymbMSbar[[BR]]
     58 MG5_aMC>generate p p > h+ w- b b~[[BR]]
     59 MG5_aMC>output HWbb_with-neutral[[BR]]
     60 MG5_aMC>exit[[BR]]
     61
     62 The parameters in the cards should be chosen according to the LHC Higgs cross section working group recommendations.
     63
     64
     654) Combine all contributions: reweight LO without neutral Higgses to NLO cross section and add neutral Higgs contribution at LO without reweighting:
     66
     67''' dσ,,final,, =  dσ,,LO,,^no-neutral^*σ,,NLO,,^no-neutral^/σ,,LO,,^no-neutral^+(dσ,,LO,,^with-neutral^-dσ,,LO,,^no-neutral^) '''
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