Identification of boosted Higgs bosons decaying into b-quark pairs with the ATLAS detector at 13 TeV
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Springer Nature
Date
2019-10-10Referencia bibliográfica
Aad, G., Abbott, B., Abbott, D.C. et al. Identification of boosted Higgs bosons decaying into b-quark pairs with the ATLAS detector at 13 TeV. Eur. Phys. J. C 79, 836 (2019). https://doi.org/10.1140/epjc/s10052-019-7335-x
Patrocinador
We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS,MOST and NSFC, China; COLCIEN-CIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, The Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, UK; DOE and NSF, USA. In addition, individual groups and members have received support fromBCKDF,CANARIE,CRCandComputeCanada, Canada; COST, ERC, ERDF, Horizon 2020, and Marie Skłodowska- Curie Actions, European Union; Investissements d’ Avenir Labex and Idex, ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF,Greece; BSF-NSF and GIF, Israel;CERCAProgramme Generalitat de Catalunya, Spain; The Royal Society and Leverhulme Trust, UK. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CCIN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NLT1 (The Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providersRésumé
This paper describes a study of techniques for
identifying Higgs bosons at high transverse momenta decaying
into bottom-quark pairs, H → b¯b , for proton–proton
collision data collected by the ATLAS detector at the Large
Hadron Collider at a centre-of-mass energy
√
s = 13 TeV.
These decays are reconstructed from calorimeter jets found
with the anti-kt R = 1.0 jet algorithm. To tag Higgs bosons,
a combination of requirements is used: b-tagging of R = 0.2
track-jets matched to the large-R calorimeter jet, and requirements
on the jetmass and other jet substructure variables.The
Higgs boson tagging efficiency and corresponding multijet
and hadronic top-quark background rejections are evaluated
using Monte Carlo simulation. Several benchmark tagging
selections are defined for different signal efficiency targets.
The modelling of the relevant input distributions used to tag
Higgs bosons is studied in 36 fb−1 of data collected in 2015
and 2016 using g → b¯b and Z(→ b¯b)γ event selections in
data. Both processes are found to be well modelled within
the statistical and systematic uncertainties.