Measurement of the production cross section for Zɣ to ν[overline ν]ɣ in pp collisions at √s = 7 TeV and limits on ZZɣ and Zɣɣ triple gauge boson couplings
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Chatrchyan2013_Article_MeasurementOfTheProductionCros.pdf
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Author(s)
CMS Collaboration
Bauer, Gerry P
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Dutta, Valentina
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Hahn, Kristian Allan
Date Issued
October 2013
Journal
Journal of High Energy Physics
Publisher
Springer Nature
Citation
Chatrchyan, S. et al. “Measurement of the production cross section for Zɣ to ν[overline ν]ɣ in pp collisions at √s = 7 TeV and limits on ZZɣ and Zɣɣ triple gauge boson couplings.” Journal of High Energy Physics 2013, 10 (October 2013): 164 © 2013 CERN for the benefit of the CMS collaboration
Version
Final published version
Abstract
A measurement of the Zɣ to ν[overline ν]ɣ cross section in pp collisions at root √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 Zɣ to ν[overline ν]ɣ 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 Zɣ production in the l⁺l⁻ɣ final state (where l is an electron or a muon) to yield the most stringent limits to date on triple gauge boson couplings. |h₃[superscript Z]| < 2.7 x 10⁻³, |h₄(Z)| < 1.3 x 10⁻⁵ for ZZ gamma and |h₃[superscript ɣ]| < 2.9 x 10⁻³, vertical bar h₄ɣ vertical bar < 1.5 x 10⁻⁵ for Zɣɣ couplings.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Attribution 4.0 International (CC BY 4.0)
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DOI of Published Version
https://doi.org/10.1007/JHEP10(2013)164
