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

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 event...

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Veröffentlicht in:	Physics letters. B 2016, Vol.760, p.448-468
Hauptverfasser:	Khachatryan, V., Besançon, M., Couderc, F., Dejardin, M., Denegri, D., Fabbro, B., Faure, J.L., Favaro, C., Ferri, F., Ganjour, S., Givernaud, A., Gras, P., Monchenault, G. Hamel De, Jarry, P., Locci, E., Machet, M., Malcles, J., Neveu, J., Rander, J., Rosowsky, A., Titov, M., Zghiche, A., Antropov, I., Baffioni, S., Beaudette, F., Busson, P., Cadamuro, L., Chapon, E., Charlot, C., Davignon, O., Filipovic, N., Granier de Cassagnac, R., Jo, M., Lisniak, S., Mastrolorenzo, L., Mine, P., Naranjo, I.N., Nguyen, M., Ochando, C., Ortona, G., Paganini, P., Pigard, P., Regnard, S., Salerno, R., Sauvan, J.B., Sirois, Y., Strebler, T., Yilmaz, Y., Zabi, A., Agram, J.-L., Andrea, J., Aubin, A., Bloch, D., Brom, J.-M., Buttignol, M., Chabert, E.C., Chanon, N., Collard, C., Conte, E., Coubez, X., Fontaine, J.-C., Gele, D., Goerlach, U., Goetzmann, C., Bihan, A.-C. Le, Merlin, J.A., Skovpen, K., Hove, P. Van, Gadrat, S., Beauceron, S., Bernet, C., Boudoul, G., Bouvier, E., Montoya, C.A. Carrillo, Chierici, R., Contardo, D., Courbon, B., Depasse, P., Mamouni, H. El, Fan, J., Fay, J., Gascon, S., Gouzevitch, M., Ille, B., Lagarde, Fabienne, Laktineh, I.B., Lethuillier, M., Mirabito, L., Pequegnot, A.L., Perries, S., Alvarez, J.D. Ruiz, Sabes, D., Sgandurra, L., Sordini, V., Donckt, M. Vander, Verdier, P., Viret, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Experiment Physics
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Zusammenfassung:	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.
ISSN:	0370-2693
DOI:	10.1016/j.physletb.2016.06.080