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journal id: "physicsxlettersxb"
| Authors | S. Chekanov, . et al, G. Grigorescu, A. Keramidas, E. Koffeman, P. Kooijman, A. Pellegrino, H. Tiecke, M. Vázquez, L. Wiggers | | Title | Multi-lepton production at high transverse momentum at HERA |
| Journal | Physics Letters B |
| Volume | 680 |
| Year | 2009 |
| Issue | 1 |
| Pages | 13-23 |
| ISSN | 03702693 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Institute for High Energy Physics (IHEF) |
| 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. |
| Document type | Article |
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