Abstract
The first measurements of diboson production cross sections in proton-proton interactions at a center-of-mass energy of 5.02TeV are reported. They are based on data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 302 pb^{-1}. Events with two, three, or four charged light leptons (electrons or muons) in the final state are analyzed. The WW, WZ, and ZZ total cross sections are measured as σ_{WW}=37.0_{-5.2}^{+5.5}(stat)_{-2.6}^{+2.7}(syst) pb, σ_{WZ}=6.4_{-2.1}^{+2.5}(stat)_{-0.3}^{+0.5}(syst) pb, and σ_{ZZ}=5.3_{-2.1}^{+2.5}(stat)_{-0.4}^{+0.5}(syst) pb. All measurements are in good agreement with theoretical calculations at combined next-to-next-to-leading order quantum chromodynamics and next-to-leading order electroweak accuracy.
Highlights
WW signal Data Number of events9.0 Æ 0.1 Æ 1.1 5.6 Æ 1.0 Æ 1.1 1.8 Æ 0.5 Æ 0.2 2.7 Æ 0.7 Æ 0.7 11.2 Æ 1.3 Æ 3.430.3 Æ 1.9 Æ 3.9 55.2 Æ 0.3 Æ 1.8 events that fulfill the SR requirements over those that only pass the total region ones
The quark-induced NNLO QCD and NLO EW contributions are combined multiplicatively (NNLO QCD × NLO EW), and the gluon- and photon-induced contributions are combined additively, following the procedure described in Ref. [53]
Minneapolis, USA. llllAlso at Karamanoğlu Mehmetbey University, Karaman, Turkey. mmmmAlso at Ain Shams University, Cairo, Egypt. nnnnAlso at Bingol University, Bingol, Turkey. ooooAlso at Georgian Technical University, Tbilisi, Georgia. ppppAlso at Sinop University, Sinop, Turkey. qqqqAlso at Erciyes University. rrrrAlso at Texas A&M University at Qatar, Doha, Qatar. ssssAlso at Kyungpook National University, Daegu, Korea
Summary
The first measurements of diboson production cross sections in proton-proton interactions at a center-ofmass energy of 5.02 TeV are reported. They are based on data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 302 pb−1. The WW, WZ, and ZZ total cross sections are measured as σWW 1⁄4 37:0−þ55..25ðstatÞþ−22..67ðsystÞ pb, σWZ 1⁄4 6.4þ−22..15ðstatÞþ−00..35ðsystÞ pb, and σZZ 1⁄4 5.3−þ22..15ðstatÞþ−00..45ðsystÞ pb. All measurements are in good agreement with theoretical calculations at combined next-to-next-to-leading order quantum chromodynamics and next-to-leading order electroweak accuracy. The study of diboson production at the CERN LHC is an important test of the standard model (SM) of particle physics because of its sensitivity to the self-interactions between gauge bosons via trilinear gauge couplings [1]
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