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Measurement of the production cross section for Zγ → ννγ in pp collisions at √s = 7 TeV and limits on ZZγ and Zγγ triple gauge boson couplings

AuthorsChatrchyan, S.; Brochero Cifuentes, J. A. ; Cabrillo, I. J. ; Calderon, Alicia ; Chuang, S. H. ; Duarte Campderros, J. ; Fernández, M. ; Gómez, G. ; González Sánchez, J. ; Graziano, A. ; Jorda, C. ; López Virto, A. ; Marco, Jesús ; Marco, Rafael ; Martínez-Rivero, Celso ; Martínez-Rivero, Celso ; Matorras, Francisco ; Muñoz Sánchez, F. J. ; Rodrigo, Teresa ; Rodríguez Marrero, Ana Y. ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; CMS Collaboration
Issue Date2013
CitationJournal of High Energy Physics: 164 (2013)
AbstractA measurement of the Zγ → ννγ 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 → ννγ 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: |hZ3| < 2.7 × 10−3, |hZ4| < 1.3 × 10−5 for ZZγ and |hγ3| < 2.9 × 10−3, |hγ4| < 1.5 × 10−5 forZγγ couplings.
DescriptionOpen Access: This article is distributed under the terms of the Creative Commons Attribution License.-- et al.
Publisher version (URL)http://dx.doi.org/10.1007/JHEP10(2013)164
Identifiersdoi: 10.1007/JHEP10(2013)164
e-issn: 1029-8479
Appears in Collections:(IFCA) Artículos
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