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physics:crosssections [2018/08/21 00:55] – [From measurements] iwnphysics:crosssections [2018/08/27 14:06] – [Cross sections at CMS] iwn
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-====== Cross sections ====== +====== Cross sections at CMS ======
  
 +This page aims to collect links for **cross sections** that are relevant for CMS. More on **luminosity** can be found [[physics:lumi|here]], and more on **PDFs** can be found [[physics:pdfs|here]] instead.
 ===== CMS samples ===== ===== CMS samples =====
  
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   * [[https://twiki.cern.ch/twiki/bin/viewauth/CMS/StandardModelCrossSectionsat13TeV|13 TeV summary (CMS TWiki)]]   * [[https://twiki.cern.ch/twiki/bin/viewauth/CMS/StandardModelCrossSectionsat13TeV|13 TeV summary (CMS TWiki)]]
-  * [[https://twiki.cern.ch/twiki/bin/view/LHCPhysics/TtbarNNLO|top quark pair production (NNLO+NNLL, CMS TWiki)]] with [[http://pdg.lbl.gov/2017/tables/rpp2017-sum-gauge-higgs-bosons.pdf|W boson branching fractions]], such that:<code> +  * [[https://twiki.cern.ch/twiki/bin/view/LHCPhysics/TtbarNNLO|top quark pair production (NNLO+NNLL, CMS TWiki)]] with [[http://pdg.lbl.gov/2017/tables/rpp2017-sum-gauge-higgs-bosons.pdf|W boson branching fractions (PDG 2017)]], such that:<code> 
-TTTo2L2Nu:        BR(dilep)   = 10.3%       831.76 pb * (3*0.1086)^2        =  88.2877 pb +TTTo2L2Nu:        BR(dilep)   = 10.6%       831.76 pb * (3*0.1086)^2        =  88.2877 pb 
-TTToHadronic:     BR(had)     = 43.5%   =>  831.76 pb * (2*3*0.1086*0.6741) = 365.3452 pb +TTToHadronic:     BR(had)     = 45.4%   =>  831.76 pb * (0.6741)^2          = 377.9607 pb 
-TTToSemiLeptonic: BR(semilep) = 46.2%       831.76 pb * (0.6741)^2          = 377.9607 pb+TTToSemiLeptonic: BR(semilep) = 43.9%       831.76 pb * (2*3*0.1086*0.6741) = 365.3452 pb
 </code> </code>
   * [[https://twiki.cern.ch/twiki/bin/view/LHCPhysics/SingleTopRefXsec|single top production (5FS NLO, CMS TWiki)]]   * [[https://twiki.cern.ch/twiki/bin/view/LHCPhysics/SingleTopRefXsec|single top production (5FS NLO, CMS TWiki)]]
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 ===== Measured ===== ===== Measured =====
  
 +  * [[https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsCombined|summary of measurements at CMS]]
   * top pair production measurements at CMS: [[https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsTOPSummaryFigures|summary]]   * top pair production measurements at CMS: [[https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsTOPSummaryFigures|summary]]
- 
  
  
physics/crosssections.txt · Last modified: 2018/08/27 14:07 by iwn

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