Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2003-11-06
Phys.Lett.B583:28-40,2004
Physics
High Energy Physics
High Energy Physics - Experiment
20 pages, 5 figures and 5 tables
Scientific paper
10.1016/j.physletb.2004.01.003
Cross sections for the production of two isolated muons up to high di-muon masses are measured in ep collisions at HERA with the H1 detector in a data sample corresponding to an integrated luminosity of 71 pb^-1 at a centre of mass energy of sqrt{s} = 319 GeV. The results are in good agreement with Standard Model predictions, the dominant process being photon-photon interactions. Additional muons or electrons are searched for in events with two high transverse momentum muons using the full data sample corresponding to 114 pb^-1, where data at sqrt{s} = 301 GeV and sqrt{s} = 319 GeV are combined. Both the di-lepton sample and the tri-lepton sample agree well with the predictions.
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