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2017:groups:np:stxsveeft [2017/06/22 11:27] caterina.vernieri |
2017:groups:np:stxsveeft [2017/10/24 10:30] (current) jorge.de_blas |
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====== Simplified Template Cross Sections (STXS) and EFT constraints ====== | ====== Simplified Template Cross Sections (STXS) and EFT constraints ====== | ||
- | People interested (add your name): Francesco Riva, Ken Mimasu, Fabio Maltoni, Benjamin Fuks, Kristin Lohwasser, Jorge de Blas, Pasquale Musella, Alexandra Carvalho, Caterina Vernieri | + | People interested (add your name): Francesco Riva, Ken Mimasu, Fabio Maltoni, Benjamin Fuks, Kristin Lohwasser, Jorge de Blas, Pasquale Musella, Alexandra Carvalho, Caterina Vernieri, Benjamin Freund, Adam Falkowski |
Perform a case study of the constraining power on EFT Wilson coefficients from Higgs data through STXS. | Perform a case study of the constraining power on EFT Wilson coefficients from Higgs data through STXS. | ||
Compare the sensitivity of performing a fit to the Wilson coefficients of interest via the STXS with a direct fit from LHC data and quantify any loss of information incurred. | Compare the sensitivity of performing a fit to the Wilson coefficients of interest via the STXS with a direct fit from LHC data and quantify any loss of information incurred. | ||
- | Processes of interest: | + | [[https://github.com/musella/LHStxsVsEft|Github repository]] |
+ | |||
+ | === Processes of interest: === | ||
* Associated production (VH->bb) | * Associated production (VH->bb) | ||
* Vector Boson Fusion (VBF->gamma gamma, tau tau, ...) | * Vector Boson Fusion (VBF->gamma gamma, tau tau, ...) | ||
- | Available UFO models: | + | === Workflow === |
- | * HEL at LO (extensive set of SILH basis operators) [[http://feynrules.irmp.ucl.ac.be/wiki/HEL|(link)]] | + | |
- | * HEL at NLO (small subset of SILH basis operators relevant for EW production) [[http://feynrules.irmp.ucl.ac.be/wiki/HELatNLO|(link)]] | + | |
- | + | ||
- | Workflow | + | |
{{:2017:groups:higgs:stxeftworkflow.png?400|{{:2017:groups:higgs:stxeftworkflow.png?400|}} | {{:2017:groups:higgs:stxeftworkflow.png?400|{{:2017:groups:higgs:stxeftworkflow.png?400|}} | ||
+ | === Tasks === | ||
+ | - Generate signal and background processes (Ken, Jorge) | ||
+ | - Modify madanalysis to smear jets and output csv file (Benjamin) | ||
+ | - Define selection cuts (Caterina and Kristin) | ||
+ | - Develop RooFit-based stat analysis (Kristin) | ||
+ | - Prepare skeleton for BDT training (Pasquale) | ||
- | Samples to generate | + | === Samples to generate === |
- | * VH(bb): SM VH, EFT VH, SM Vbb | + | * Baseline: |
+ | * 500k events / process | ||
+ | * 4-5 EFT points (start with 1-2) | ||
+ | * VH(bb): SM Z(ll)H, EFT Z(ll)H, SM Z(ll)bb (100<mbb<150) | ||
* VBF(tau tau): SM VBF, EFT VBF, SM Z(tau tau) | * VBF(tau tau): SM VBF, EFT VBF, SM Z(tau tau) | ||
- | * EFT operators to probe: TBD | + | * EFT operators to probe: OHW (SILH), more? |
+ | === Selection cuts and smearing === | ||
+ | |||
+ | == ZH->bbar == | ||
+ | |||
+ | References | ||
+ | https://cds.cern.ch/record/2206813/files/ATLAS-CONF-2016-091.pdf?version=1 | ||
+ | https://journals.aps.org/prd/abstract/10.1103/PhysRevD.89.012003 | ||
+ | |||
+ | Selections: | ||
+ | * leptons > 25 GeV ,|eta|<2.5 | ||
+ | * bjets, |eta| < 2.5, pT>20 | ||
+ | * Z mass window --> 75 - 105 | ||
+ | * ptV>0 GeV | ||
+ | |||
+ | |||
+ | == VBS Htautau == | ||
References: | References: | ||
+ | https://cds.cern.ch/record/2264522/files/HIG-16-043-pas.pdf | ||
+ | |||
+ | Selections: | ||
+ | * Exactly 2 jets > 30 gev | ||
+ | * mjj>300 GeV | ||
+ | * detajj>2.5 | ||
+ | * [((vectorial sum pT taus+met > 50 GeV (lep) / > 100 GeV (had) )) - Note: would probably leave it out?] | ||
+ | * pT (tau) >30 GeV coming from | ||
+ | * tau_had: >50 / >40 | ||
+ | * lep-had: >20 (26e) / > 30 (had) | ||
+ | * lep-lep: 13(e)/24(m) / 24(e) / 15(m) | ||
+ | |||
+ | |||
+ | == Smearings == | ||
+ | * CMS particle flow Jet resolution -> https://arxiv.org/pdf/1706.04965.pdf | ||
+ | * ATLAS resolution on taus: http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/PERF-2013-06 | ||
+ | |||
+ | |||
+ | === Available UFO models: === | ||
+ | * HEL at LO (extensive set of SILH basis operators) [[http://feynrules.irmp.ucl.ac.be/wiki/HEL|(link)]] | ||
+ | * HEL at NLO (small subset of SILH basis operators relevant for EW production) [[http://feynrules.irmp.ucl.ac.be/wiki/HELatNLO|(link)]] | ||
+ | |||
+ | === References: === | ||
* Session 1 STXS page. [[https://phystev.cnrs.fr/wiki/2017:groups:higgs:stxs| (link) ]] | * Session 1 STXS page. [[https://phystev.cnrs.fr/wiki/2017:groups:higgs:stxs| (link) ]] | ||
* Rivet tool implementing stage 1 and 0 selections maintained by LHCHXSWG [[https://svnweb.cern.ch/cern/wsvn/lhchiggsxs/repository/TemplateXS/| (link)]] | * Rivet tool implementing stage 1 and 0 selections maintained by LHCHXSWG [[https://svnweb.cern.ch/cern/wsvn/lhchiggsxs/repository/TemplateXS/| (link)]] | ||
+ | |||
+ |