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2023:groups:smjets:flavoured-jets:start [2023/06/14 15:51]
andreas.hinzmann created
2023:groups:smjets:flavoured-jets:start [2023/06/18 10:54] (current)
simone.caletti [Parameters of the algorithms]
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 +====== Setup ======
 +  * LHC @ 13 TeV
 +  * PDF set: PDF4LHC21_40
 +  * [[https://​github.com/​jetflav|flavoured jet fastjet repos]] ​ (all 4 algorithms will be provided here)
 +  * Rivet analysis: [[https://​github.com/​DReichelt/​LH23FlavAlgs]]
  
-Definition ​of samples+===== Input Parameters ===== 
 +  * GF   = 1.16638e-5 
 +  * mW   = 80.351971594491 
 +  * GW   = 2.0842988936726 
 +  * mZ   = 91.153480619183 
 +  * GZ   = 2.4942663787728 
 +  * MH   = ? (for WH) 
 +  * mb   = ? (for WH) 
 + 
 +===== V + flavoured jet study ===== 
 +NNLO (massless) and NLO+PS studies for Z+b and Z+c production (will adopt same selections cuts and binning for both processes). 
 + 
 +  * off-shell Z -> mu+ mu- 
 +  * pT(Z) > 20 GeV  (for generation cuts of event sample, to be jet-algo agnostic) 
 +  * central scale choice E_T(Z) = sqrt(m(mu+mu-)^2 + pT(mu+mu-)^2) 
 +  * mu+ & mu- with pT(mu) > 20 GeV, |y(mu)| < 2.4 and 71 GeV < m(mu+mu-) < 111 GeV 
 + 
 +==== Fiducial cuts, observables & binning ==== 
 +We will adapt the same analysis (selection cuts + histogram binning) as in the 8 TeV CMS measurement [[https://​www.hepdata.net/​record/​ins1499471|HEPData]],​ [[https://​rivet.hepforge.org/​analyses/​CMS_2017_I1499471|Rivet]].  
 +Note the additional "​generation cut" ptz > 20 GeV and that we'll perform our study at 13 TeV. 
 + 
 +===== WH (H->bb) study ===== 
 +Fixed-order NNLO predictions with and without bottom-quark masses.  
 +Idea: study how large the log(mb) are in different kinematic regimes and how differences in flavour tagging impact observables.  
 + 
 +===== Parameters of the algorithms ===== 
 +  * IFN with alpha = 2 (-> omega = 1) 
 +  * GHS alpha = 1.0; beta  = 1.0; zcut  = 0.1; Rcut  = 0.1; omega = 2.0; 
 +  * SDFlav with zcut = 0.1; beta = 1; 
 +  * CMP_Omega with a = 0.1
  
-fastjet implementation 
  
  
2023/groups/smjets/flavoured-jets/start.1686750703.txt.gz · Last modified: 2023/06/14 15:51 by andreas.hinzmann