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Measurement of the production cross section for Zγ→ν(ν-bar)γ in pp collisions at s√=7 TeV and limits on ZZγ and Zγγ triple gauge boson couplings
Baringer, Philip S. Bean, Alice Benelli, Gabriele Kenny, R. P., III Murray, Michael J. Noonan, Danny Sanders, Stephen J. Stringer, Robert W. Wood, Jeffrey Scott Chatrchyan, S.
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Kenny, R. P., III
Murray, Michael J.
Noonan, Danny
Sanders, Stephen J.
Stringer, Robert W.
Wood, Jeffrey Scott
Chatrchyan, S.
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Abstract
A measurement of the Zγ→ν(ν-bar)γ cross section in pp collisions at s√=7 TeV is presented, using data corresponding to an integrated luminosity of 5.0 fb(−1) collected with the CMS detector. This measurement is based on the observation of events with an imbalance of transverse energy in excess of 130 GeV and a single photon in the absolute pseudorapidity range |η| < 1.4 with transverse energy above 145 GeV. The Zγ→ν(ν-bar)γ production cross section is measured to be 21.1 ± 4.2 (stat.) ± 4.3 (syst.) ± 0.5 (lum.) fb, which agrees with the standard model prediction of 21.9 ± 1.1 fb. The results are combined with the CMS measurement of Zγ production in the ℓ (+) ℓ (−) γ final state (where ℓ is an electron or a muon) to yield the most stringent limits to date on triple gauge boson couplings: ∣∣h(Z)(3)∣∣<2.7×10(−3) , ∣∣h(Z)(4)∣∣<1.3×10(−5) for ZZγ and ∣∣h(γ)(3)∣∣<2.9×10(−3) , ∣∣h(γ)(4)∣∣<1.5×10(−5) for Zγγ couplings.
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This is the publisher's version, also available electronically from http://link.springer.com/article/10.1007%2FJHEP10%282013%29164.
Date
2013-10-24
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Springer Berlin Heidelberg
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S. Chatrchyan et al. (2103). "Measurement of the production cross section for Zγ→νν-bar γ in pp collisions at s√=7 TeV and limits on ZZγ and Zγγ triple gauge boson couplings." Journal of High Energy Physics, 10(2013):164. http://www.dx.doi.org/10.1007/JHEP10(2013)164.