Abstract
Abstract: Events with at least two high transverse momentum leptons (electrons or
muons) are studied using the H1 and ZEUS detectors at HERA with an integrated lumi-
nosity of 0.94 fb−1. The observed numbers of events are in general agreement with the
Standard Model predictions. Seven di- and tri-lepton events are observed in e+p collision
data with a scalar sum of the lepton transverse momenta above 100GeV while 1.94 ± 0.17
events are expected. Such events are not observed in e−p collisions for which 1.19 ± 0.12
are predicted. Total visible and differential di-electron and di-muon photoproduction cross
sections are extracted in a restricted phase space dominated by photon-photon collisions.
Original language | Undefined/Unknown |
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Pages (from-to) | 013/1-013/10 |
Number of pages | 10 |
Journal | Journal of High Energy Physics |
Volume | 10 |
Publication status | Published - 2009 |