Indirect measurement of sin[superscript 2]θ[subscript W] (M[subscript W]) using e[superscript +]e[superscript -] pairs in the Z-boson region with p[¯ over p] collisions at a center-of-momentum energy of 1.96 TeV
Name
Aaltonen-2013-Indirect measurement of.pdf
Size
1.51 MB
Format
Adobe PDF
Checksum (MD5)
c724d8d8f4055131e32e71676ee593db
Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
October 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaltonen, T., S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, et al. “Indirect measurement of sin^{2}θ_{W} (M_{W}) using e^{+}e^{-} pairs in the Z-boson region with pp[over ¯] collisions at a center-of-momentum energy of 1.96 TeV.” Physical Review D 88, no. 7 (October 2013). © 2013 American Physical Society
Version
Final published version
Abstract
Drell-Yan lepton pairs are produced in the process p[¯ over p] → e[superscript +]e[superscript −] + X through an intermediate γ[superscript *]/Z boson. The lepton angular distributions are used to provide information on the electroweak-mixing parameter sin[superscript 2]θ[subscript W] via its observable effective-leptonic sin[superscript 2]θ[subscript W], or sin[superscript 2]θ[eff over lept]. A new method to infer sin[superscript 2]θ[subscript W] or, equivalently, the W-boson mass M[subscript W] in the on-shell scheme, is developed and tested using a previous CDF Run II measurement of angular distributions from electron pairs in a sample corresponding to 2.1 fb[superscript −1] of integrated luminosity from p[¯ over p] collisions at a center-of-momentum energy of 1.96 TeV. The value of sin[superscript 2]θ[eff over lept] is found to be 0.2328 ± 0.0011. Within a specified context of the standard model, this results in sin[superscript 2]θ[subscript W] = 0.2246 ± 0.0011, which corresponds to a W-boson mass of 80.297 ± 0.055 GeV/c[superscript 2], in agreement with previous determinations in electron-position collisions and at the Tevatron collider.
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.88.072002
