ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s = 13 TeV

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...

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Detalles Bibliográficos
Autores principales: Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Hoya, Joaquín, Monticelli, Fernando Gabriel, Orellana, Gonzalo Enrique, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Física
Particle physics
Physics
Bottom quark
Atlas (topology)
Top quark
Particle identification
Statistical analysis
Large hadron collider
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126586
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126586
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Particle physics
Physics
Bottom quark
Atlas (topology)
Top quark
Particle identification
Statistical analysis
Large hadron collider
spellingShingle Física
Particle physics
Physics
Bottom quark
Atlas (topology)
Top quark
Particle identification
Statistical analysis
Large hadron collider
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s = 13 TeV
topic_facet Física
Particle physics
Physics
Bottom quark
Atlas (topology)
Top quark
Particle identification
Statistical analysis
Large hadron collider
description 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 → W b 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.
format Articulo
Articulo
author Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alonso, Francisco
title ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s = 13 TeV
title_short ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s = 13 TeV
title_full ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s = 13 TeV
title_fullStr ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s = 13 TeV
title_full_unstemmed ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s = 13 TeV
title_sort atlas b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s = 13 tev
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/126586
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