@misc{10481/59083,
year = {2019},
month = {11},
url = {http://hdl.handle.net/10481/59083},
abstract = {The algorithms used by the ATLAS Collaboration
during Run 2 of the Large Hadron Collider to identify
jets containing b-hadrons are presented. The performance of
the algorithms is evaluated in the simulation and the efficiency
with which these algorithms identify jets containing
b-hadrons is measured in collision data. The measurement
uses a likelihood-based method in a sample highly enriched
in tt events. The topology of the t → Wb decays is exploited
to simultaneously measure both the jet flavour composition
of the sample and the efficiency in a transverse momentum
range from 20 to 600 GeV. The efficiency measurement is
subsequently compared with that predicted by the simulation.
The data used in this measurement, corresponding to
a total integrated luminosity of 80.5 fb−1, were collected
in proton–proton collisions during the years 2015–2017 at
a centre-of-mass energy
√
s = 13 TeV. By simultaneously
extracting both the efficiency and jet flavour composition,
this measurement significantly improves the precision compared
to previous results, with uncertainties ranging from 1
to 8% depending on the jet transverse momentum.},
organization = {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; COLCIENCIAS,
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, United
Kingdom;DOEandNSF,USA. In addition, individual groups andmembers
have received support from BCKDF, CANARIE, CRC and Compute
Canada, 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; CERCA Programme
Generalitat de Catalunya, Spain; The Royal Society and Leverhulme
Trust, UK.},
publisher = {Springer Nature},
title = {ATLAS b-jet identification performance and efficiency measurement with tt events in pp collisions at √ s = 13 TeV},
doi = {10.1140/epjc/s10052-019-7450-8},
author = {Aad, G. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration},
}