Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC
Name
Chatrchyan-2011-Measurement of the weak mixing angle with the.pdf
Size
776.03 KB
Format
Adobe PDF
Checksum (MD5)
11057d2753312d637f373ac9c3069bf0
Author(s)
Alver, Burak Han
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Chan, M.
Dutta, Valentina
Everaerts, Pieter Bruno Bart
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Date Issued
December 2011
Journal
Physical Review D
Publisher
American Physical Society
Citation
Chatrchyan, S. et al. (CMS Collaboration). “Measurement of the Weak Mixing Angle with the Drell-Yan Process in Proton-proton Collisions at the LHC.” Physical Review D 84.11 (2011): [23 pages].
Version
Final published version
Abstract
A multivariate likelihood method to measure electroweak couplings with the Drell–Yan 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[superscript -1]. From the dominant uu̅ , dd̅ -->γ[superscript *]/Z-->μ-μ+ process, the effective weak mixing angle parameter is measured to be sin[superscript 2]theta[subscript eff]=0.2287±0.0020(stat.)±0.0025 (syst.). This result is consistent
with measurements from other processes, as expected within the standard model.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevD.84.112002
