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2015:groups:tools:vbb [2015/11/18 17:26]
carlo.oleari
2015:groups:tools:vbb [2016/03/17 19:19] (current)
christian.reuschle [Ongoing work and planned contributions:]
Line 116: Line 116:
   * W-Width ​   = 2.1054 GeV   * W-Width ​   = 2.1054 GeV
   * CKM   * CKM
-      ​Vud=0.97428 +     ​- ​Vud=0.97428 
-      Vus=0.2253 +     - Vus=0.2253 
-      Vub=0.00347 +     - Vub=0.00347 
-      Vcd=0.2252 +     - Vcd=0.2252 
-      Vcs=0.97345 +     - Vcs=0.97345 
-      Vcb=0.0410 +     - Vcb=0.0410 
-      Vtd=0.00862 +     - Vtd=0.00862 
-      Vts=0.0403 +     - Vts=0.0403 
-      Vtb=0.999152+     - Vtb=0.999152
       ​       ​
-  * PDF_Set ​   = MSTW2008 ​ (21100 in the LHE numbering scheme)+  * PDF_Set ​ = MSTW2008 ​ (21100 in the LHE numbering scheme)
  
-=== Herwig (Christian) ===+  * Results for W+bb+j:  
 +     * {{:​2015:​groups:​tools:​powheg-wbbj-d01-x01-y01.pdf|}} 
 +     * {{:​2015:​groups:​tools:​powheg-wbbj-d02-x01-y01.pdf|}} 
 +     * {{:​2015:​groups:​tools:​powheg-wbbj-d02-x02-y01.pdf|}}
  
-  ​* Z+bb +=== Herwig (Graeme, Christian) === 
-  * W+bb(?+ 
 +Preliminary results for Zbb production in the 5FS can be found on http://​www.hep.man.ac.uk/​u/​graeme/​public/​LH_Vbb/​preliminary/​Zbb/​ 
 +  ​Shown are the four matching-shower combinations of Herwig7, i.e. 
 +    - NLO$\oplus$QTilde aka MCatNLO-based matching with the angular-ordered shower, 
 +    - NLO$\oplus$Dipole aka MCatNLO-based matching with the dipole shower, 
 +    - NLO$\otimes$QTilde aka Powheg-based matching with the angular-ordered shower, 
 +    - NLO$\otimes$Dipole aka Powheg-based matching with the dipole shower. 
 +  * The uncertainty bands are purely from scale variations with respect to all scales in the hard sub-processes and in the shower, i.e. muR, muF (and the corresponding scales of $\alpha_s$ and PDF arguments in the shower) and muQ (shower start scale). 
 +  * The central scale choice is a fixed scale (mass) at the moment for muR=muF=muQ. 
 +  * The PDF sets being used are the default PDF sets to which the showers are tuned, i.e. MMHT2014lo68cl and MMHT2014nlo68cl. 
 +  * The underlying hard process is $p p \to e^e^- b \bar{b}$, with $b,​\bar{b}\in p$ and we cut on the final state b quarks by requiring at least two jets, with a min. pT of 18 GeV and 15 GeV for the first and second jet respectively. ​ 
 +  * Statistics: 40k, unweighted. 
 + 
 + 
 +Preliminary results for Zb production in the 5FS can be found on http://​www.hep.man.ac.uk/​u/​graeme/​public/​LH_Vbb/​preliminary/​Zb/​ 
 +  * Description:​ see the first four main bullet points above. 
 +  * The underlying hard process is $p p \to e^e^- {b,​\bar{b}}$,​ with $b,​\bar{b}\in p$ and we cut on the final state b quark by requiring at least one jet, with a min. pT of 18 GeV for the first jet. 
 +  * We cut on the invariant mass of the charged-lepton pair, with a min. inv. mass of 60 GeV and a max. inv. mass of 120 GeV. 
 +  * Statistics: 100k, unweighted. 
 + 
 + 
 +Preliminary results for Zbb production in the 4FS can be found on http://​www.hep.fsu.edu/​~creuschle/​public/​.Plots_2016_LHVbb_Preliminary/​plots_Zbb_4FS_MMHTnf5_BnotinJ_0Jet_NoBCut_WeightedOff_FixedScale/​ 
 +  * Shown is NLO$\oplus$QTilde ​(MCatNLO-DefaultShowerand NLO$\otimes$QTilde (Powheg-DefaultShower). 
 +  * Scale choices, scale variations and choice of PDF sets as described above. 
 +  * The underlying hard process is $p p \to e^+ e^- b \bar{b}$, with $b,​\bar{b}\notin p$. There are no cuts on the b quarks. 
 +  * We cut on the invariant mass of the charged-lepton pair, with a min. inv. mass of 60 GeV and a max. inv. mass of 120 GeV. 
 +  * We cut slightly on the charged leptons, with a min. pT of 5 GeV and a rapidity range between -4 and 4. 
 +  * Statistics: 100k, unweighted. 
 + 
 + 
 +Preliminary results for Wbb production in the 4FS can be found on http://​www.hep.fsu.edu/​~creuschle/​public/​.Plots_2016_LHVbb_Preliminary/​plots_Wbb_4FS_MMHTnf5_BnotinJ_0Jet_NoBCut_WeightedOff_FixedScale/​ 
 +  * Shown is NLO$\oplus$QTilde (MCatNLO-DefaultShower) and NLO$\otimes$QTilde (Powheg-DefaultShower). 
 +  * The central scale choice is a fixed scale (W mass) at the moment for muR=muF=muQ. 
 +  * Scale variations and choice of PDF sets as described above. 
 +  * The underlying hard process is $p p \to l \nu b \bar{b}$, considering $e^{\pm},​\mu^{\pm}\in l$. There are no cuts on the b quarks. 
 +  * We cut on the transverse mass of the W, with a min. trans. mass of 20 GeV. 
 +  * We cut slightly on the charged lepton, with a min. pT of 5 GeV and a rapidity range between -4 and 4. 
 +  * Statistics: 100k, unweighted. 
 + 
 + 
 +Further studies on Zbb production in the 4FS, for a different PDF choice, can be found on https://​www.itp.kit.edu/​~reuschle/​.Plots_2016_LHVbb_Preliminary/​Zbb4FS/​plots_NNPDFnf4_BnotinJ_0Jet_MCatNLO-DefaultShower_WeightedOn_Central/​ 
 +  * Shown is the NLO$\oplus$QTilde aka MCatNLO-based matching with the angular ordered shower. 
 +  * No scale variations. 
 +  * The central scale choice is a fixed scale (Z mass) at the moment for muR=muF=muQ. 
 +  * The PDF set being used is NNPDF30_nlo_as_0118_nf_4. 
 +  * Statistics: 1M, weighted. 
 + 
 + 
 +Further studies on Wbb production in the 4FS, for varying PDF choices, can be found on https://​www.itp.kit.edu/​~reuschle/​.Plots_2016_LHVbb_Preliminary/​Wbb4FS/​plots_AllPDFs_BinJ_1Jet_MCatNLO-DefaultShower_WeightedOff_Central/​ or similarly for on https://​www.itp.kit.edu/​~reuschle/​.Plots_2016_LHVbb_Preliminary/​Wbb4FS/​plots_AllPDFs_BnotinJ_0Jet_MCatNLO-DefaultShower_WeightedOff_Central/​ 
 +  * The difference between the two is that for one we require one jet (which may contain a b quark) with a certain min pT (first link), for the other we don't cut on the b quarks at all (second link). 
 +  * Shown is the NLO$\oplus$QTilde aka MCatNLO-based matching with the angular ordered shower. 
 +  * No scale variations. 
 +  * The central scale choice is a fixed scale (W mass) at the moment for muR=muF=muQ. 
 +  * There is a choice of different PDF sets being used, i.e. 
 +    - MMHTnf5: MMHT2014lo68cl and MMHT2014nlo68cl,​ 
 +    - MMHTnf4: MMHT2014nlo68cl_nf4,​ 
 +    - NNPDFnf5: NNPDF30_lo_as_0118 and NNPDF30_nlo_as_0118,​ 
 +    - NNPDFnf4: NNPDF30_lo_as_0118_nf_4 and NNPDF30_nlo_as_0118_nf_4. 
 +  * Statistics: 100k, unweighted. 
 + 
 + 
 +The remaining parts of the description of the run setups can be found in the vbb.pdf file in the draft for the proceedings. 
 +==== github instructions ==== 
 + 
 +To setup your local repository 
 +  - go to github.com and get an account 
 +  - log in, go to https://​github.com/​vciulli/​leshouches_vbb 
 +  - In the top-right corner of the page, click Fork 
 +  - open a shell where git is available 
 +  - clone the repository with the command: git clone git@github.com:​your_git_username/​leshouches_vbb.git 
 +    - if you have problems with ssh publickey try: git clone https://​github.com/​your_git_username/​leshouches_vbb.git 
 +  - enjoy 
 + 
 +To start contributing 
 +  - modify/add a file 
 +  - add file(s) to local repository: git add filename.bla 
 +  - commit file(s) to local repository: git commit -m "​commit messate"​ filename.bla 
 +  - "​push"​ modifications to your remote (i.e. github) repository : git push 
 +  - inform Vitaliano to include your modifications to the main repositiry 
 + 
 +To synch your repository with the main repository 
 +  - git pull https://​github.com/​vciulli/​leshouches_vbb master
2015/groups/tools/vbb.1447863992.txt.gz · Last modified: 2015/11/18 17:26 by carlo.oleari