Title
Search for squark production in R-parity violating supersymmetry at HERA
Date Issued
01 December 2004
Access level
open access
Resource Type
research 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.
Berger N.
Berndt T.
Bizot J.C.
Böhme J.
Boenig M.O.
Boudry V.
Bracinik J.
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.
Cerny K.
Chekelian V.
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.
Demirchyan R.
de Roeck A.
Desch K.
de Wolf E.A.
Diaconu C.
Dingfelder J.
Dodonov V.
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.
Garutti E.
Garvey J.
Gayler J.
Gerhards R.
Gerlich C.
Ghazaryan S.
Goerlich L.
Gogitidze N.
Gorbounov S.
Grab C.
Grässler H.
Greenshaw T.
Gregori M.
Grindhammer G.
Gwilliam C.
Haidt D.
Abstract
A search for squarks in R-parity violating supersymmetry is performed in e ±p collisions at HERA using the HI detector. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3pb -1 for e +p collisions and 13.5pb -1 for e -p collisions. The resonant production of squarks via a Yukawa coupling λ′ is considered, taking into account direct and indirect R-parity violating decay modes. No evidence for squark production is found in the multi-lepton and multi-jet final state topologies investigated. Mass dependent limits on λ′ are obtained in the framework of the Minimal Supersymmetric Standard Model. In addition, the results are interpreted in terms of constraints on the parameters of the minimal Supergravity model. At the 95 % confidence level squarks of all flavours with masses up to 275 GeV are excluded in a large part of the parameter space for a Yukawa coupling of electromagnetic strength. For a coupling strength 100 times smaller, masses up to 220 GeV can be ruled out. © Springer-Verlag / Società Italiana di Fisica 2004.
Start page
425
End page
440
Volume
36
Issue
4
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Subjects
Scopus EID
2-s2.0-19444376812
Source
European Physical Journal C
ISSN of the container
14346044
Sources of information:
Directorio de Producción Científica
Scopus