Study of tau-pair production at HERA

H. Abramowicz, L. Adamczyk, M. Adamus, R. Aggarwal, S. Antonelli, P. Antonioli, A. Antonov, M. Arneodo, V. Aushev, Y. Aushev, O. Bachynska, A. Bamberger, A. N. Barakbaev, G. Barbagli, G. Bari, F. Barreiro, N. Bartosik, D. Bartsch, M. Basile, O. BehnkeJ. Behr, U. Behrens, L. Bellagamba, A. Bertolin, S. Bhadra, M. Bindi, C. Blohm, V. Bokhonov, T. Bold, O. Bolilyi, E. G. Boos, K. Borras, D. Boscherini, S. K. Boutle, I. Brock, E. Brownson, R. Brugnera, N. Bruemmer, A. Bruni, G. Bruni, B. Brzozowska, P. J. Bussey, J. M. Butterworth, B. Bylsma, A. Caldwell, M. Capua, R. Carlin, C. D. Catterall, S. Chekanov, A. Pellegrino, ZEUS Collaboration

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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.

Original languageEnglish
Article number117
Pages (from-to)1-22
Number of pages23
JournalJournal of High Energy Physics
Issue number2
Early online dateFeb-2011
DOIs
Publication statusPublished - 2011
Externally publishedYes

Keywords

  • Lepton-Nucleon Scattering
  • CENTRAL TRACKING DETECTOR
  • ZEUS BARREL CALORIMETER
  • HIGH TRANSVERSE-MOMENTA
  • EP COLLISIONS
  • HADRON-COLLISIONS
  • LEPTON PRODUCTION
  • DESIGN
  • CONSTRUCTION
  • PERFORMANCE
  • SYSTEM

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