Title
Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Volume/pages
84(2011) :11 , p. 1-23
ISSN
0556-2821
ISI
000297936800001
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
A multivariate likelihood method to measure electroweak couplings with the DrellYan process at the LHC is presented. The process is described by the dilepton rapidity, invariant mass, and decay angle distributions. The decay angle ambiguity due to the unknown assignment of the scattered constituent quark and antiquark to the two protons in a collision is resolved statistically using correlations between the observables. The method is applied to a sample of dimuon events from proton-proton collisions at √s=7  TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 1.1  fb-1. From the dominant uu̅ , dd̅ →γ*/Z→μ-μ+ process, the effective weak mixing angle parameter is measured to be sin⁡2θeff=0.2287±0.0020 (stat.)±0.0025 (syst.). This result is consistent with measurements from other processes, as expected within the standard model.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/827d76/11057d27.pdf
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