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Title: Measurement of the $W^+W^-$ cross section in pp collisions at $$\sqrt{s}$$ = 8 TeV and limits on anomalous gauge couplings

Abstract

A measurement of the W boson pair production cross section in proton-proton collisions at √ s = 8 TeV is presented. The data we collected with the CMS detector at the LHC correspond to an integrated luminosity of 19.4 fb-1 . The W+W- candidates are selected from events with two charged leptons, electrons or muons, and large missing transverse energy. The measured W+W- cross section is 60.1 ± 0.9 (stat) ± 3.2 (exp) ± 3.1 (theo) ± 1.6 (lumi) pb = 60.1 ± 4.8 pb, consistent with the standard model prediction. The W+W-cross sections are also measured in two different fiducial phase space regions. In addition, the normalized differential cross section is measured as a function of kinematic variables of the final-state charged leptons and compared with several perturbative QCD predictions. Limits on anomalous gauge couplings associated with dimension-six operators are also given in the framework of an effective field theory. Finally, the corresponding 95% confidence level intervals are -5.7 < cWWW2 < 5.9 TeV-2, -11.4 < cW2 < 5.4 TeV-2 , -29.2 < cB2 < 23.9 TeV-2, in the HISZ basis.

Authors:
 [1]
  1. Yerevan Physics Inst. (YerPhI) (Armenia). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1221302
Alternate Identifier(s):
OSTI ID: 1411637
Report Number(s):
FERMILAB-PUB-15-330-CMS
Journal ID: ISSN 1434-6044; arXiv eprint number arXiv:1507.03268; TRN: US1601619
Grant/Contract Number:  
AC02-07CH11359; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 76; Journal Issue: 7; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Khachatryan, Vardan. Measurement of the $W^+W^-$ cross section in pp collisions at $\sqrt{s}$ = 8 TeV and limits on anomalous gauge couplings. United States: N. p., 2016. Web. doi:10.1140/epjc/s10052-016-4219-1.
Khachatryan, Vardan. Measurement of the $W^+W^-$ cross section in pp collisions at $\sqrt{s}$ = 8 TeV and limits on anomalous gauge couplings. United States. doi:10.1140/epjc/s10052-016-4219-1.
Khachatryan, Vardan. Fri . "Measurement of the $W^+W^-$ cross section in pp collisions at $\sqrt{s}$ = 8 TeV and limits on anomalous gauge couplings". United States. doi:10.1140/epjc/s10052-016-4219-1. https://www.osti.gov/servlets/purl/1221302.
@article{osti_1221302,
title = {Measurement of the $W^+W^-$ cross section in pp collisions at $\sqrt{s}$ = 8 TeV and limits on anomalous gauge couplings},
author = {Khachatryan, Vardan},
abstractNote = {A measurement of the W boson pair production cross section in proton-proton collisions at √ s = 8 TeV is presented. The data we collected with the CMS detector at the LHC correspond to an integrated luminosity of 19.4 fb-1 . The W+W- candidates are selected from events with two charged leptons, electrons or muons, and large missing transverse energy. The measured W+W- cross section is 60.1 ± 0.9 (stat) ± 3.2 (exp) ± 3.1 (theo) ± 1.6 (lumi) pb = 60.1 ± 4.8 pb, consistent with the standard model prediction. The W+W-cross sections are also measured in two different fiducial phase space regions. In addition, the normalized differential cross section is measured as a function of kinematic variables of the final-state charged leptons and compared with several perturbative QCD predictions. Limits on anomalous gauge couplings associated with dimension-six operators are also given in the framework of an effective field theory. Finally, the corresponding 95% confidence level intervals are -5.7 < cWWW/Λ2 < 5.9 TeV-2, -11.4 < cW/Λ2 < 5.4 TeV-2 , -29.2 < cB/Λ2 < 23.9 TeV-2, in the HISZ basis.},
doi = {10.1140/epjc/s10052-016-4219-1},
journal = {European Physical Journal. C, Particles and Fields},
number = 7,
volume = 76,
place = {United States},
year = {2016},
month = {7}
}

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