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Measurement of the W+W- cross section in pp collisions at root s=8 TeV and limits on anomalous gauge couplings

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1515.pdf (1.727Mb)
Authors
Khachatryan, V.
Adžić, Petar
Ekmedzic, M.
Milošević, Jovan
Rekovic, V.
Đorđević, Miloš
Milenović, Predrag
CMS Collaboration (ukupan broj autora: 2316)
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Abstract
A measurement of the W boson pair production cross section in proton-proton collisions at root s = 8TeV is presented. The data 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. 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. The corresponding 95 % confidence level intervals are -5.7 LT c(WWW)/L...ambda(2) LT 5.9TeV(-2), -11.4 LT c(W)/Lambda(2) LT 5.4TeV(-2), -29.2 LT c(B)/Lambda(2) LT 23.9 TeV-2, in the HISZ basis.

Source:
European Physical Journal C. Particles and Fields, 2016, 76, 7
Projects:
  • SCOAP3

DOI: 10.1140/epjc/s10052-016-4219-1

ISSN: 1434-6044; 1434-6052

PubMed: 28286414

WoS: 000399486000001

Scopus: 2-s2.0-84978795068
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URI
http://vinar.vin.bg.ac.rs/handle/123456789/1519
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Vinča

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