Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC

S Chatrchyan; C Amsler; V Chiochia; C Favaro; M Verzetti; H Snoek; E Aguiló; S De Visscher; P Otyugova; A Schmitt; J Storey; M Ivova; B Millan; Yasar Onel; CMS Collaboration

doi:10.1103/PhysRevD.84.112002

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Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC

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Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC

S Chatrchyan, C Amsler, V Chiochia, C Favaro, M Verzetti, H Snoek, E Aguiló, S De Visscher, P Otyugova, A Schmitt, …

Physical review. D, Particles, fields, gravitation, and cosmology, Vol.84(11), 112002

2011

DOI: 10.1103/PhysRevD.84.112002

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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-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. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2011 CERN, for the CMS Collaboration

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Details

Title: Subtitle: Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC
Creators: S Chatrchyan
C Amsler
V Chiochia
C Favaro
M Verzetti
H Snoek
E Aguiló
S De Visscher
P Otyugova
A Schmitt
J Storey
M Ivova
B Millan
Yasar Onel - Physics and Astronomy
CMS Collaboration
Resource Type: Journal article
Publication Details: Physical review. D, Particles, fields, gravitation, and cosmology, Vol.84(11), 112002
DOI: 10.1103/PhysRevD.84.112002
ISSN: 1550-7998
eISSN: 1550-2368
Publisher: American Physical Society
Grant note: DOI: 10.13039/100000015, name: U.S. Department of Energy; DOI: 10.13039/100000001, name: National Science Foundation
Language: English
Date published: 2011
Academic Unit: Physics and Astronomy
Record Identifier: 9984428683902771

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