Measurement of W± boson production in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector

A measurement of W± boson production in Pb+Pb collisions at √sNN = 5.02 TeV is reported using data recorded by the ATLAS experiment at the LHC in 2015, corresponding to a total integrated luminosity of 0.49 nb−1. The W± bosons are reconstructed in the electron or muon leptonic decay channels. Produc...

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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
Lepton
Parton
Distribution function
Muon
Pseudorapidity
Boson
Impact parameter
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125940
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125940
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
Lepton
Parton
Distribution function
Muon
Pseudorapidity
Boson
Impact parameter
spellingShingle Física
Particle physics
Physics
Lepton
Parton
Distribution function
Muon
Pseudorapidity
Boson
Impact parameter
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurement of W± boson production in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
topic_facet Física
Particle physics
Physics
Lepton
Parton
Distribution function
Muon
Pseudorapidity
Boson
Impact parameter
description A measurement of W± boson production in Pb+Pb collisions at √sNN = 5.02 TeV is reported using data recorded by the ATLAS experiment at the LHC in 2015, corresponding to a total integrated luminosity of 0.49 nb−1. The W± bosons are reconstructed in the electron or muon leptonic decay channels. Production yields of leptonically decaying W± bosons, normalised by the total number of minimum-bias events and the nuclear thickness function, are measured within a fiducial region defined by the detector acceptance and the main kinematic requirements. These normalised yields are measured separately for W+ and W− bosons, and are presented as a function of the absolute value of pseudorapidity of the charged lepton and of the collision centrality. The lepton charge asymmetry is also measured as a function of the absolute value of lepton pseudorapidity. In addition, nuclear modification factors are calculated using the W± boson production cross-sections measured in pp collisions. The results are compared with predictions based on next-to-leading-order calculations with CT14 parton distribution functions as well as with predictions obtained with the EPPS16 and nCTEQ15 nuclear parton distribution functions. No dependence of normalised production yields on centrality and a good agreement with predictions are observed for midcentral and central collisions. For peripheral collisions, the data agree with predictions within 1.7 (0.9) standard deviations for W− (W+) bosons.
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 Measurement of W± boson production in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
title_short Measurement of W± boson production in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
title_full Measurement of W± boson production in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
title_fullStr Measurement of W± boson production in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
title_full_unstemmed Measurement of W± boson production in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
title_sort measurement of w± boson production in pb+pb collisions at √snn = 5.02 tev with the atlas detector
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/125940
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bdutipo_str Repositorios
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