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Title
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Multi-lepton production at high transverse momenta in ep collisions at HERA
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Author
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Institution/Organisation
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H1 Collaboration
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Abstract
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| Processes leading to a final state with at least two high transverse momentum leptons (electrons or muons) are studied using the full e±p data sample collected by the H1 experiment at HERA. The data correspond to an integrated luminosity of 463 pb−1. Di-lepton and tri-lepton event classes are investigated. Cross sections of the production of e+e− and ì+ì− pairs are derived in a restricted phase space dominated by photonphoton collisions. In general, good agreement is found with Standard Model predictions. Events are observed with a total scalar sum of lepton transverse momenta above 100 GeV where the Standard Model expectation is low. In this region, combining di-lepton and tri-lepton classes, five events are observed in e+p collisions, compared to a Standard Model expectation of 0.96±0.12, while no such event is observed in e−p data for 0.64±0.09 expected. |
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Language
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English
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Source (journal)
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Physics letters : B. - Amsterdam, 1967, currens
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Publication
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Amsterdam
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North-Holland
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2008
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ISSN
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0370-2693
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DOI
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10.1016/J.PHYSLETB.2008.08.057
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Volume/pages
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668
:4
(2008)
, p. 268-276
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ISI
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000260480300004
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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