Measurement of W± Z production cross sections and gauge boson polarisation in pp collisions at √s = 13 TeV with the ATLAS detector

This paper presents measurements of W± Z production cross sections in pp collisions at a centre-of-mass energy of 13 TeV. The data were collected in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider, and correspond to an integrated luminosity of 36.1 fb−1. The W± Z candidate events...

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Autores principales: Alconada Verzini, María Josefina, 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
Electron
Vector boson
Electroweak interaction
Muon
Helicity
Atlas experiment
Gauge boson
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126518
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126518
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
Electron
Vector boson
Electroweak interaction
Muon
Helicity
Atlas experiment
Gauge boson
spellingShingle Física
Particle physics
Physics
Electron
Vector boson
Electroweak interaction
Muon
Helicity
Atlas experiment
Gauge boson
Alconada Verzini, María Josefina
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± Z production cross sections and gauge boson polarisation in pp collisions at √s = 13 TeV with the ATLAS detector
topic_facet Física
Particle physics
Physics
Electron
Vector boson
Electroweak interaction
Muon
Helicity
Atlas experiment
Gauge boson
description This paper presents measurements of W± Z production cross sections in pp collisions at a centre-of-mass energy of 13 TeV. The data were collected in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider, and correspond to an integrated luminosity of 36.1 fb−1. The W± Z candidate events are reconstructed using leptonic decay modes of the gauge bosons into electrons and muons. The measured inclusive cross section in the detector fiducial region for a single leptonic decay mode is σ fid. W± Z→ l' v ll = 63.7 ± 1.0 (stat.) ± 2.3 (syst.) ± 1.4 (lumi.) fb, reproduced by the next-to-next-to-leading-order Standard Model prediction of 61.5+1.4 −1.3 fb. Cross sections for W+ Z and W− Z production and their ratio are presented as well as differential cross sections for several kinematic observables. An analysis of angular distributions of leptons from decays of W and Z bosons is performed for the first time in pair-produced events in hadronic collisions, and integrated helicity fractions in the detector fiducial region are measured for the W and Z bosons separately. Of particular interest, the longitudinal helicity fraction of pair-produced vector bosons is also measured.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Measurement of W± Z production cross sections and gauge boson polarisation in pp collisions at √s = 13 TeV with the ATLAS detector
title_short Measurement of W± Z production cross sections and gauge boson polarisation in pp collisions at √s = 13 TeV with the ATLAS detector
title_full Measurement of W± Z production cross sections and gauge boson polarisation in pp collisions at √s = 13 TeV with the ATLAS detector
title_fullStr Measurement of W± Z production cross sections and gauge boson polarisation in pp collisions at √s = 13 TeV with the ATLAS detector
title_full_unstemmed Measurement of W± Z production cross sections and gauge boson polarisation in pp collisions at √s = 13 TeV with the ATLAS detector
title_sort measurement of w± z production cross sections and gauge boson polarisation in pp collisions at √s = 13 tev with the atlas detector
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/126518
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