Title
Multi-electron production at high transverse momenta in ep collisions at HERA
Date Issued
01 January 2003
Access level
open access
Resource Type
journal article
Author(s)
Aktas A.
Andreev V.
Anthonis T.
Asmone A.
Babaev A.
Backovic S.
Bähr J.
Baranov P.
Barrelet E.
Bartel W.
Baumgartner S.
Becker J.
Beckingham M.
Behnke O.
Behrendt O.
Belousov A.
Berger C.
Berndt T.
Bizot J.C.
Böhme J.
Boenig M.O.
Boudry V.
Bracinik J.
Braunschweig W.
Brisson V.
Bröker H.B.
Brown D.P.
Bruncko D.
Büsser F.W.
Bunyatyan A.
Buschhorn G.
Bystritskaya L.
Campbell A.J.
Caron S.
Cassol-Brunner F.
Chekelian V.
Clarke D.
Collard C.
Contreras J.G.
Coppens Y.R.
Coughlan J.A.
Cousinou M.C.
Cox B.E.
Cozzika G.
Cvach J.
Dainton J.B.
Dau W.D.
Daum K.
Delcourt B.
Delerue N.
Demirchyan R.
de Roeck A.
de Wolf E.A.
Diaconu C.
Dingfelder J.
Dodonov V.
Dowell J.D.
Dubak A.
Duprel C.
Eckerlin G.
Efremenko V.
Egli S.
Eichler R.
Eisele F.
Ellerbrock M.
Elsen E.
Erdmann M.
Erdmann W.
Faulkner P.J.W.
Favart L.
Fedotov A.
Felst R.
Ferencei J.
Fleischer M.
Fleischmann P.
Fleming Y.H.
Flucke G.
Flügge G.
Fomenko A.
Foresti I.
Formánek J.
Franke G.
Frising G.
Gabathuler E.
Gabathuler K.
Garvey J.
Gassner J.
Gayler J.
Gerhards R.
Gerlich C.
Ghazaryan S.
Goerlich L.
Gogitidze N.
Gorbounov S.
Grab C.
Grabski V.
Grässler H.
Greenshaw T.
Gregori M.
Grindhammer G.
Publisher(s)
Springer New York LLC
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 ± 0.04 and 0.23 ± 0.04, respectively.
Start page
17
End page
29
Volume
31
Issue
1
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física Física nuclear
DOI
10.1140/epjc/s2003-01326-x
Scopus EID
2-s2.0-1242334939
Source
European Physical Journal C
ISSN of the container
14346044
Sources of information: Directorio de Producción Científica Scopus