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. (C) 2009 Elsevier B.V. All rights reserved.

Multi-lepton production at high transverse momentum at HERA / S., C., M., D., S., M., B., M., D., N., J., R., R., Y., M. C. K., M., P., A., G., B., L., B., D., B., A., B., G., B., F., C., M., C., G., L., A., M., R., N., A., P., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 680:1(2009), pp. 13-23. [10.1016/j.physletb.2009.08.026]

Multi-lepton production at high transverse momentum at HERA

D'AGOSTINI, Giulio;NIGRO, Andrea;
2009

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. (C) 2009 Elsevier B.V. All rights reserved.
2009
01 Pubblicazione su rivista::01a Articolo in rivista
Multi-lepton production at high transverse momentum at HERA / S., C., M., D., S., M., B., M., D., N., J., R., R., Y., M. C. K., M., P., A., G., B., L., B., D., B., A., B., G., B., F., C., M., C., G., L., A., M., R., N., A., P., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 680:1(2009), pp. 13-23. [10.1016/j.physletb.2009.08.026]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/361738
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