Measurement of the Zγ production cross section in pp collisions at 8 TeV and search for anomalous triple gauge boson couplings

A bstract The cross section for the production of Z γ in proton-proton collisions at 8 TeV is measured based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 19.5 fb −1 . Events with an oppositely-charged pair of muons or electrons together with an isol...

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Veröffentlicht in:	The journal of high energy physics 2015-04, Vol.2015 (4), Article 164
Hauptverfasser:	Kiesenhofer, W., Treberer-Treberspurg, W., Carvalho, W., Wang, D., Cabrera, A., Hamel de Monchenault, G., Andrea, J., Mirabito, L., Sordini, V., Vander Donckt, M., Edelhoff, M., Knutzen, S., Sonnenschein, L., Nowack, A., Cakir, A., Nayak, A., Görner, M., Kogler, R., Frensch, F., Müller, Th, Nürnberg, A., Ulrich, R., Zsigmond, A. J., Naimuddin, M., Maity, M., Castro, A., Rossi, A. M., Potenza, R., Paoletti, S., Moroni, L., Paganoni, M., Re, V., Mantovani, G., Tonelli, G., Diemoz, M., Pinna Angioni, G. L., Song, S., Murzin, V., Krasnikov, N., Epshteyn, V., Andreev, V., Kalinin, A., Gonzalez Lopez, O., Missiroli, M., Calderon, A., Marco, R., Piedra Gomez, J., Benhabib, L., Bondu, O., Cerminara, G., Elliott-Peisert, A., Guthoff, M., Hammer, J., Innocente, V., Lourenço, C., Veres, G. I., Nessi-Tedaldi, F., Cerci, S., Bilin, B., Cankocak, K., Kreczko, L., Paramesvaran, S., Cockerill, D. J. A., Charaf, O., Lawson, P., Shrinivas, A., Mott, A., Russ, J., Luiggi Lopez, E., Chaves, J., Freeman, J., Merkel, P., Mrenna, S., Mei, H., Rodriguez, J. L., Adams, T., Hagopian, S., Bucinskaite, I., Sen, S., Swartz, M., Malek, M., Sanders, S., Ivanov, A., Calvert, B., Lee, Y.-J., Luckey, P. D., Zhukova, V., Kao, S. C., Kubota, Y., Baumgartel, D., Zhang, J., Lannon, K., Winer, B. L., Mooney, M., Hu, Z., Contreras-Campana, E., Lath, A., Eusebi, R., Mao, Y., Cepeda, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Classical and Quantum Gravitation Elementary Particles Hadron-Hadron Scattering High Energy Physics - Experiment Physics Physics and Astronomy PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Quantum Field Theories Quantum Field Theory Quantum Physics Regular Article - Experimental Physics Relativity Theory String Theory
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Zusammenfassung:	A bstract The cross section for the production of Z γ in proton-proton collisions at 8 TeV is measured based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 19.5 fb −1 . Events with an oppositely-charged pair of muons or electrons together with an isolated photon are selected. The differential cross section as a function of the photon transverse momentum is measured inclusively and exclusively, where the exclusive selection applies a veto on central jets. The observed cross sections are compatible with the expectations of next-to-next-to-leading-order quantum chromodynamics. Limits on anomalous triple gauge couplings of ZZ γ and Z γγ are set that improve on previous experimental results obtained with the charged lepton decay modes of the Z boson.
ISSN:	1029-8479 1126-6708 1029-8479
DOI:	10.1007/JHEP04(2015)164