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Multi-lepton Production at High Transverse Momentum at HERA

  • S. Chekanov
  • , M. Derrick
  • , S. Magill
  • , B. Musgrave
  • , D. Nicholass
  • , J. Repond
  • , R. Yoshida
  • , Margarita C. K. Mattingly
  • , P. Antonioli
  • , G. Bari
  • , L. Bellagamba
  • , D. Boscherini
  • , A. Bruni
  • , G. Bruni
  • , F. Cindolo
  • , M. Corradi
  • , G. Iacobucci
  • , A. Margotti
  • , R. Nania
  • , A. Polini
  • S. Antonelli, M. Basile, M. Bindi, L. Cifarelli, A. Contin, S. De Pasquale, G. Sartorelli, A. Zichichi, D. Bartsch, I. Brock, H. Hartmann
  • Argonne National Laboratory
  • Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
  • Universität Bonn

Research output: Contribution to journalArticle

Abstract

A search for events containing two or more high-transverse-momentum isolated leptons has been performed in ep collisions with the ZEUS detector at HERA using the full collected data sample, corresponding to an integrated luminosity of 480 pb -1. The number of observed events has been compared with the prediction from the Standard Model, searching for possible deviations, especially for multi-lepton events with invariant mass larger than 100 GeV. Good agreement with the Standard Model has been observed. Total and differential cross sections for di-lepton production have been measured in a restricted phase space dominated by photon-photon collisions. © 2009 Elsevier B.V.

Original languageAmerican English
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume2009
Issue number10
DOIs
StatePublished - Sep 14 2009

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