2015:groups:tools:vbb
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2015:groups:tools:vbb [2015/07/06 12:11] philippe.gras Moved to e-group mailing list |
2015:groups:tools:vbb [2016/02/29 01:30] christian.reuschle [github instructions] |
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| ====== A comparison of generators/fixed order predictions for Z+b(b) and W+b(b) among them and against data ====== | ====== A comparison of generators/fixed order predictions for Z+b(b) and W+b(b) among them and against data ====== | ||
| - | //If you are interested in contributing please subscribe to the [[https://e-groups.cern.ch/e-groups/EgroupsSearch.do?searchValue=houches-2015-topics-tools-vb|mailing list]].// | + | Papers: |
| + | http://arxiv.org/pdf/1107.3714.pdf (Campbell et al.) | ||
| + | |||
| + | //If you are interested in contributing please subscribe to the [[https://e-groups.cern.ch/e-groups/EgroupsSearch.do?searchValue=houches-2015-topics-tools-vb|mailing list]]. You will be asked to log in with your CERN account. If you don't have a CERN account, please fill [[https://account.cern.ch/account/Externals/RegisterAccount.aspx|this form]] to create a lightweight account.// | ||
| Gavin Hesketh, Vitaliano Ciulli, Rikkert Frederix, Marek Schoenherr, Paolo Francavilla, Gionata Luisoni, Davide Napoletano, Carlo Pandini, Frank Krauss, Carlo Oleari, Stefano Pozzorini, ... | Gavin Hesketh, Vitaliano Ciulli, Rikkert Frederix, Marek Schoenherr, Paolo Francavilla, Gionata Luisoni, Davide Napoletano, Carlo Pandini, Frank Krauss, Carlo Oleari, Stefano Pozzorini, ... | ||
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| * _h_min_dR_ZB_boost: Differential cross section as a function of the angular variable $\mathrm{min}\Delta R_{\mathrm{ZB}}$ | * _h_min_dR_ZB_boost: Differential cross section as a function of the angular variable $\mathrm{min}\Delta R_{\mathrm{ZB}}$ | ||
| * _h_A_ZBB_boost: Differential cross section as a function of the angular variable $\mathrm{A}_{\mathrm{ZBB}}$ | * _h_A_ZBB_boost: Differential cross section as a function of the angular variable $\mathrm{A}_{\mathrm{ZBB}}$ | ||
| + | |||
| + | ==== Ongoing work and planned contributions: ==== | ||
| + | |||
| + | === Sherpa (Davide, Frank) === | ||
| + | |||
| + | Samples: | ||
| + | * 4F MC@NLO (pp->Zbb) | ||
| + | * 5F MEPS@LO (pp->Z + pp->Zj+ pp-> Zjj + pp -> Z jjj) all processes at LO, | ||
| + | * 5F MEPS@NLO (pp->Z + pp->Zj+ pp-> Zjj) MC@NLO + (pp -> Z jjj) at LO. | ||
| + | Notes: | ||
| + | * For the 5F_LO scheme different choices of mass treatment in the ME | ||
| + | * PDF variations: NNPDF30, CT14, MMHT14 (aS(mZ)=0.118) | ||
| + | * both parton and particle level | ||
| + | * Possibly Wbb too if enough time | ||
| + | |||
| + | 4F Scheme Set Up: | ||
| + | * b-Mass = 4.72 GeV | ||
| + | * Z-Mass = 91.1876 GeV | ||
| + | * PDF_Set = NNPDF30_nlo_as_0118_nf_4 | ||
| + | * alphaS(mZ) = 0.118 | ||
| + | * Events = 400M (Weighted) | ||
| + | |||
| + | 5F Scheme Set Up: (Both MEPS@LO and MEPS@NLO) | ||
| + | * PDF_Set = NNPDF30_nnlo_as_0118 | ||
| + | * alphaS(mZ) = 0.118 | ||
| + | * QCUT merging = 10.0 GeV | ||
| + | * Events = 200M (LO) ~ 1B (NLO) (Weighted) | ||
| + | |||
| + | Preliminary Plots (may still change): | ||
| + | * ATLAS: https://users.hepforge.org/~dnapoletano/Lh_proceedings_Vbb/Zbb/ATLAS_2014_I1306294/index.html | ||
| + | * CMS : https://users.hepforge.org/~dnapoletano/Lh_proceedings_Vbb/Zbb/CMS_TEST/index.html | ||
| + | |||
| + | === Powheg (Gionata, Carlo) === | ||
| + | |||
| + | * W+bb and W+bb+j | ||
| + | 4F scheme set up + matching with alphas and PDF with 5 flavours | ||
| + | * b-Mass = 4.75 GeV | ||
| + | * Z-Mass = 91.1876 GeV | ||
| + | * W-Width = 2.1054 GeV | ||
| + | * CKM | ||
| + | - Vud=0.97428 | ||
| + | - Vus=0.2253 | ||
| + | - Vub=0.00347 | ||
| + | - Vcd=0.2252 | ||
| + | - Vcs=0.97345 | ||
| + | - Vcb=0.0410 | ||
| + | - Vtd=0.00862 | ||
| + | - Vts=0.0403 | ||
| + | - Vtb=0.999152 | ||
| + | | ||
| + | * PDF_Set = MSTW2008 (21100 in the LHE numbering scheme) | ||
| + | |||
| + | * 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|}} | ||
| + | |||
| + | === Herwig (Graeme, Christian) === | ||
| + | |||
| + | * Z+bb | ||
| + | * W+bb(?) | ||
| + | |||
| + | ==== 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 clone https://github.com/vciulli/leshouches_vbb master | ||
2015/groups/tools/vbb.txt · Last modified: 2016/03/17 19:19 by christian.reuschle
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