Measurement of the e+e- → ZZ production cross section at centre-of-mass energies of 183 and 189 GeV

R. Barate, D. Decamp, P. Ghez, C. Goy, S. Jezequel, J. P. Lees, F. Martin, E. Merle, M. N. Minard, B. Pietrzyk, R. Alemany, S. Bravo, M. P. Casado, M. Chmeissani, J. M. Crespo, E. Fernandez, M. Fernandez-Bosman, L. Garrido, E. Graugès, A. JusteM. Martinez, G. Merino, R. Miquel, L. M. Mir, P. Morawitz, A. Pacheco, I. Riu, H. Ruiz, A. Colaleo, D. Creanza, M. de Palma, 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, G. Boix, O. Buchmüller, M. Cattaneo, F. Cerutti, V. Ciulli, G. Davies, G. Dissertori, H. Drevermann, R. W. Forty, M. Frank, F. Gianotti, T. C. Greening, A. W. Halley, J. B. Hansen, J. Harvey, P. Janot, B. Jost, I. Lehraus, O. Leroy, P. Maley, P. Mato, A. Minten, A. Moutoussi, F. Ranjard, L. Rolandi, D. Schlatter, M. Schmitt, O. Schneider, P. Spagnolo, W. Tejessy, F. Teubert, E. Tournefier, A. E. Wright, Z. Ajaltouni, F. Badaud, G. Chazelle, O. Deschamps, S. Dessagne, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil

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Abstract

The e+e- → ZZ cross section at √s = 182.7 and 188.6 GeV has been measured using the ALEPH detector. A cut-based analysis yields cross section measurements of σzz(182.7GeV) = 0.11 ± 0.110.16 (stat.) ± 0.04 (syst.) pb and σZZ(188.6 GeV) = 0.69 ± 0.120.13 (stat.) ± 0.03 (syst.) pb . A neural network-based analysis yields σZZ(188.6GeV) = 0.64 ± 0.110.12 (stat.) ± 0.04 (syst.) pb . These measurements are consistent with the Standard Model expectations. © 1999 Published by Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)287-302
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume469
Issue number1-4
DOIs
Publication statusPublished - 1 Jan 1999

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    Barate, R., Decamp, D., Ghez, P., Goy, C., Jezequel, S., Lees, J. P., Martin, F., Merle, E., Minard, M. N., Pietrzyk, B., Alemany, R., Bravo, S., Casado, M. P., Chmeissani, M., Crespo, J. M., Fernandez, E., Fernandez-Bosman, M., Garrido, L., Graugès, E., ... Monteil, S. (1999). Measurement of the e+e- → ZZ production cross section at centre-of-mass energies of 183 and 189 GeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 469(1-4), 287-302. https://doi.org/10.1016/S0370-2693(99)01288-5