Measurement of the Z gamma to nu nu-bar gamma production cross section in pp collisions at sqrt(s) = 8 TeV and limits on anomalous Z-Z-gamma and Z-gamma-gamma trilinear gauge boson couplings

CMS;Basegmez, Suzan;Beluffi, Camille;Bondu, Olivier;Vidal Maroño, Miguel;et.al.
(2016) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B760, p. 448-468 (2016)

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Authors
  • CMSUCLouvain
    Author
  • Basegmez, SuzanUCLouvain
    Author
  • Beluffi, CamilleUCLouvain
    Author
  • Bondu, OlivierUCLouvain
    Author
  • Brochet, SébastienUCLouvain
    Author
  • Author
  • Caudron, AdrienUCLouvain
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  • Ceard, LudivineUCLouvain
    Author
  • Da Silveira, Gustavo GilUCLouvain
    Author
  • Author
  • Favart, DenisUCLouvain
    Author
  • Forthomme, LaurentUCLouvain
    Author
  • Author
  • Jafari, AbidehUCLouvain
    Author
  • Jez, PavelUCLouvain
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  • Komm, MatthiasUCLouvain
    Author
  • Author
  • Mertens, AlexandreUCLouvain
    Author
  • Musich, MarcoUCLouvain
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  • Nuttens, ClaudeUCLouvain
    Author
  • Perrini, LuciaUCLouvain
    Author
  • Pin, ArnaudUCLouvain
    Author
  • Piotrzkowski, KrzysztofUCLouvain
    Author
  • Popov, AndreyUCLouvain
    Author
  • Author
  • Selvaggi, MicheleUCLouvain
    Author
  • Vidal Maroño, MiguelUCLouvain
    Author
  • et. al.
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Abstract
A measurement of the Z gamma to nu nu-bar gamma production cross section in pp collisions at sqrt(s) = 8 TeV is presented, using data corresponding to an integrated luminosity of 19.6 inverse femtobarns collected with the CMS detector at the LHC. This measurement is based on the observation of events with large missing energy and with a single photon with transverse momentum above 145 GeV and absolute pseudorapidity in the range |eta| < 1.44. The measured Z gamma to nu nu-bar gamma production cross section, 52.7 +/- 2.1(stat) +/- 6.4 (syst) +/- 1.4 (lumi) fb, agrees well with the standard model prediction of 50.0 +2.4 -2.2 fb. A study of the photon transverse momentum spectrum yields the most stringent limits to date on the anomalous Z-Z-gamma and Z-gamma-gamma trilinear gauge boson couplings.
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Citations

CMS, Basegmez, S., Beluffi, C., Bondu, O., Brochet, S., Bruno, G., Caudron, A., Ceard, L., Da Silveira, G. G., Delaere, C., Favart, D., Forthomme, L., Giammanco, A., Jafari, A., Jez, P., Komm, M., Lemaitre, V., Mertens, A., Musich, M., et al. (2016). Measurement of the Z gamma to nu nu-bar gamma production cross section in pp collisions at sqrt(s) = 8 TeV and limits on anomalous Z-Z-gamma and Z-gamma-gamma trilinear gauge boson couplings. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B760, 448-468. https://doi.org/10.1016/j.physletb.2016.06.080 (Original work published 2016)