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

• Main Authors: CMS Collaboration (Author), Bauer, Gerry P (Contributor), Bendavid, Joshua L. (Contributor), Busza, Wit (Contributor), Butz, Erik M. (Contributor), Cali, Ivan Amos (Contributor), Chan, Matthew Hans (Contributor), Dutta, Valentina (Contributor), Gomez-Ceballos, Guillelmo (Contributor), Goncharov, Maxim (Contributor), Hahn, Kristian Allan (Contributor), Kim, Yongsun (Contributor), Klute, Markus (Contributor), Li, Wei (Contributor), Luckey Jr, P David (Contributor), Ma, Teng (Contributor), Nahn, Steven (Contributor), Paus, Christoph M. E. (Contributor), Ralph, Duncan Kelley (Contributor), Roland, Christof E (Contributor), Roland, Gunther M (Contributor), Rudolph, Matthew Scott (Contributor), Stephans, George S. F. (Contributor), Stoeckli, Fabian (Contributor), Sumorok, Konstanty C (Contributor), Sung, Kevin Kai Hong (Contributor), Velicanu, Dragos Alexandru (Contributor), Wenger, Edward Allen (Contributor), Wolf, Roger (Contributor), Wyslouch, Boleslaw (Contributor), Xie, Si (Contributor), Yang, Ming (Contributor), Yilmaz, Yetkin (Contributor), Yoon, A. S. (Contributor), Zanetti, Marco (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: Springer Nature, 2018-07-30T20:37:24Z.
• Subjects: Article
• Online Access: Get fulltext

 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.