en
Scientific article
Open access
English

Measurement of the forward-backward asymmetry of electron and muon pair-production in pp collisions at √s = 7 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 1509, p. 049-092
Collection
  • Open Access - SCOAP3
Publication date2015
Abstract

This paper presents measurements from the ATLAS experiment of the forward-backward asymmetry in the reaction pp → Z/γ * → l + l − , with l being electrons or muons, and the extraction of the effective weak mixing angle. The results are based on the full set of data collected in 2011 in pp collisions at the LHC at √s = 7 TeV, corresponding to an integrated luminosity of 4.8 fb −1 . The measured asymmetry values are found to be in agreement with the corresponding Standard Model predictions. The combination of the muon and electron channels yields a value of the effective weak mixing angle of sin 2 θ eff lept  = 0.2308 ± 0.0005(stat.) ± 0.0006(syst.) ± 0.0009(PDF), where the first uncertainty corresponds to data statistics, the second to systematic effects and the third to knowledge of the parton density functions. This result agrees with the current world average from the Particle Data Group fit.

Keywords
  • Hadron-Hadron Scattering
Citation (ISO format)
ATLAS Collaboration. Measurement of the forward-backward asymmetry of electron and muon pair-production in pp collisions at √s = 7 TeV with the ATLAS detector. In: The journal of high energy physics, 2015, vol. 1509, p. 049–092. doi: 10.1007/JHEP09(2015)049
Main files (1)
Article (Published version)
Identifiers
ISSN of the journal1029-8479
453views
98downloads

Technical informations

Creation10/01/2015 10:01:11 AM
First validation10/01/2015 10:01:11 AM
Update time03/14/2023 11:39:05 PM
Status update03/14/2023 11:39:05 PM
Last indexation02/12/2024 11:22:40 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack