Study of taupair production at HERA

A. Levy, H. Abramowicz, L. Adamczyk, M. Adamus, R. Aggarwal, S. Antonelli, P. Antonioli, A.A. Antonov, M. Arneodo, Y. Aushev

109 more authors

Y.Aushev, O. Bachynska, A. Bamberger, A.N. Barakbaev, G. Barbagli, G Bari, Fernando Barreiro, N. Bartosik, D. Bartsch, M. Basile, O. Behnke, U. Behrens, U. Behrens, L. Bellagamba, A. Bertolin, S. Bhadra, M. Bindi, C. Blohm, V. Bokhonov, T. Bołd, O. Bolilyi, E. Boos, K. Borras, D. Boscherini, D. Bot, S. Boutle, Ian C. Brock, E. Brownson, R. Brugnera, N.C. Brümmer, G. Bruni, B. Brzozowska, Peter John Bussey, Jonathan Mark Butterworth, Ben Bylsma, Allen Christopher Caldwell, M. Capua, R. Carlin, C. D. Catterall, Sergei V. Chekanov, J. J. Chwastowski, J. Ciborowski, R. Ciesielski, L. Cifarelli, F. Cindolo, A. Contin, A. M. Cooper-Sarkar, N. Coppola, M. Corradi, F. Corriveau, M. Costa, G. D’Agostini, F. Dal Corso, J. Del Peso, R. K. Dementiev, S. De Pasquale, Malcolm Derrick, R.C.E. Devenish, D. Dobur, B. A. Dolgoshein, Ganna Dolinska, A. T. Doyle, V Drugakov, L. S. Durkin, S. Dusini, Yael Eisenberg, P.F. Ermolov, A. Eskreys, S. Fang, Salvatore Fazio, J. Ferrando, M.I. Ferrero, J. Figiel, M. Forrest, B. Foster, S. Fourletov, G. Gach, A. Galas, E. Gallo, A. Garfagnini, A. Geiser, I. Gialas, L. K. Gladilin, D. Gladkov, Claudia Glasman, O. Gogota, Yu. A. Golubkov, P. Göttlicher, V. Aushev, Giacomo Bari, R. Ciesielski, M. Costa, E. Gallo, Grzegorz Grzelak, O. Gueta, Claire Gwenlan, GIUSEPPE IACOBUCCI, M. Kaur, Prabhdeep Kaur, E. ̃Tassi, B. Pawlik, P. Stopa, L. Zawiejski, M. Przybycień, Matthew Wing, Ritu Aggarwal, Aleksander Filip Zarnecki, M. Lisovyi, E. M. Lobodzinska

Journal of High Energy Physics, 2011

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DOI 10.1007/jhep02(2011)117
Data confidence 85 high
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Abstract

A study of events containing two tau leptons with high transverse momentum has been performed with the ZEUS detector at HERA, using a data sample corresponding to an integrated luminosity of 0.33 fb −1 . The tau candidates were identified from their decays into electrons, muons or hadronic jets. The number of tau-pair candidates has been compared with the prediction from the Standard Model, where the largest contribution is expected from Bethe-Heitler processes. The total visible cross section was extracted. Standard Model expectations agree well with the measured distributions, also at high invariant mass of the tau pair.