# Multi-electron production at high transverse momenta in $ep$ collisions at HERA

Abstract : Multi-electron production is studied at high electron transverse momentum in positron- and electron-proton collisions using the H1 detector at HERA. The data correspond to an integrated luminosity of 115 pb-1. Di-electron and tri-electron event yields are measured. Cross sections are derived in a restricted phase space region dominated by photon-photon collisions. In general good agreement is found with the Standard Model predictions. However, for electron pair invariant masses above 100 GeV, three di-electron events and three tri-electron events are observed, compared to Standard Model expectations of 0.30 \pm 0.04 and 0.23 \pm 0.04, respectively.
Document type :
Journal articles

Cited literature [4 references]

http://hal.in2p3.fr/in2p3-00014217
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Submitted on : Thursday, December 11, 2003 - 10:05:03 AM
Last modification on : Friday, October 22, 2021 - 4:28:56 AM
Long-term archiving on: : Tuesday, March 30, 2010 - 6:04:59 PM

### Identifiers

• HAL Id : in2p3-00014217, version 1

### Citation

A. Aktas, V. Andreev, T. Anthonis, A. Asmone, A. Babaev, et al.. Multi-electron production at high transverse momenta in $ep$ collisions at HERA. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2003, 31, pp.17-29. ⟨in2p3-00014217⟩

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