Measurement of triple gauge WWγ couplings at LEP2 using photonic events

R. Barate, D. Buskulic, D. Decamp, P. Ghez, C. Goy, S. Jezequel, J. P. Lees, A. Lucotte, F. Martin, E. Merle, M. N. Minard, J. Y. Nief, P. Perrodo, B. Pietrzyk, R. Alemany, M. P. Casado, M. Chmeissani, J. M. Crespo, M. Delfino, E. FernandezM. Fernandez-Bosman, L. Garrido, E. Graugès, A. Juste, M. Martinez, G. Merino, R. Miquel, L. M. Mir, P. Morawitz, A. Pacheco, I. C. Park, A. Pascual, I. Riu, F. Sanchez, A. Colaleo, D. Creanza, M. de Palma, G. Gelao, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, U. Becker, G. Boix, M. Cattaneo, F. Cerutti, V. Ciulli, G. Dissertori, H. Drevermann, R. W. Forty, M. Frank, F. Gianotti, A. W. Halley, J. B. Hansen, J. Harvey, P. Janot, B. Jost, I. Lehraus, O. Leroy, C. Loomis, P. Maley, P. Mato, A. Minten, L. Moneta, A. Moutoussi, N. Qi, F. Ranjard, L. Rolandi, D. Rousseau, D. Schlatter, M. Schmitt, O. Schneider, W. Tejessy, F. Teubert, I. R. Tomalin, E. Tournefier, M. Vreeswijk, H. Wachsmuth, Z. Ajaltouni, F. Badaud, G. Chazelle

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Abstract

A study of events with photons and missing energy has been performed with the data sample obtained with the ALEPH detector at centre-of-mass energies from 161 to 184 GeV, corresponding to a total integrated luminosity of about 80 pb-1. The measured distributions are in agreement with Standard Model predictions, leading to constraints on WWy gauge coupling parameters Δ κγ and λγ. The results from the fit to the cross sections and to the energy and angular distributions of the photons are: Δκγ = 0.05-1.10+1.15(stat) ± 0.25(syst), λγ = -0.05-1.45+1.55(stat) ± 0.30(syst). © 1998 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)239-248
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume445
Issue number1-2
DOIs
Publication statusPublished - 31 Dec 1998

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