Title
Multi-leptons with high transverse momentum at HERA
Date Issued
01 December 2009
Access level
open access
Resource Type
journal article
Author(s)
Aaron F.D.
Abramowicz H.
Abt I.
Adamczyk L.
Adamus M.
Aldaya Martin M.
Alexa C.
Alimujiang K.
Andreev V.
Antonelli S.
Antonioli P.
Antonov A.
Antunovic B.
Arneodo M.
Asmone A.
Aushev V.
Bachynska O.
Backovic S.
Baghdasaryan A.
Bamberger A.
Barakbaev A.N.
Barbagli G.
Bari G.
Barreiro F.
Barrelet E.
Bartel W.
Bartsch D.
Basile M.
Begzsuren K.
Behnke O.
Behr J.
Behrens U.
Bellagamba L.
Belousov A.
Bertolin A.
Bhadra S.
Bindi M.
Bizot J.C.
Blohm C.
Bold T.
Boos E.G.
Borodin M.
Borras K.
Boscherini D.
Bot D.
Boudry V.
Boutle S.K.
Bozovic-Jelisavcic I.
Bracinik J.
Brandt G.
Brinkmann M.
Brisson V.
Brock I.
Brownson E.
Brugnera R.
Brümmer N.
Bruncko D.
Bruni A.
Bruni G.
Brzozowska B.
Bunyatyan A.
Buschhorn G.
Bussey P.J.
Butterworth J.M.
Bylsma B.
Bystritskaya L.
Caldwell A.
Campbell A.J.
Cantun Avila K.B.
Capua M.
Carlin R.
Cassol-Brunner F.
Catterall C.D.
Cerny K.
Cerny V.
Chekanov S.
Chekelian V.
Cholewa A.
Chwastowski J.
Ciborowski J.
Ciesielski R.
Cifarelli L.
Cindolo F.
Contin A.
Contreras J.G.
Cooper-Sarkar A.M.
Coppola N.
Corradi M.
Corriveau F.
Costa M.
Coughlan J.A.
Cozzika G.
Cvach J.
D'Agostini G.
Dainton J.B.
Dal Corso F.
Daum K.
Deák M.
De Boer Y.
De Favereau J.
Abstract
Events with at least two high transverse momentum leptons (electrons or muons) are studied using the H1 and ZEUS detectors at HERA with an integrated luminosity of 0.94 fb-1. The observed numbers of events are in general agreement with the Standard Model predictions. Seven di- and tri-lepton events are observed in e+p collision data with a scalar sum of the lepton transverse momenta above 100GeV while 1.94 ± 0.17 events are expected. Such events are not observed in e-p collisions for which 1.19 ± 0.12 are predicted. Total visible and differential di-electron and di-muon photoproduction cross sections are extracted in a restricted phase space dominated by photon-photon collisions. © SISSA 2009.
Volume
2009
Issue
10
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Física nuclear
Subjects
Scopus EID
2-s2.0-81755161996
Source
Journal of High Energy Physics
ISSN of the container
10298479
Sources of information:
Directorio de Producción Científica
Scopus