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Leif Jönsson

Leif Jönsson

Professor emeritus

Leif Jönsson

Search for light gravitinos in events with photons and missing transverse momentum at HERA

Author

  • A Aktas
  • V Andreev
  • T Anthonis
  • A Asmone
  • A Babaev
  • S Backovic
  • J Bahr
  • P Baranov
  • E Barrelet
  • W Bartel
  • S Baumgartner
  • J Becker
  • M Beckingham
  • O Behnke
  • O Behrendt
  • A Belousov
  • C Berger
  • N Berger
  • T Berndt
  • JC Bizot
  • J Bohme
  • MO Boenig
  • V Boudry
  • J Bracinik
  • V Brisson
  • HB Broker
  • DP Brown
  • D Bruncko
  • FW Busser
  • A Bunyatyan
  • G Buschhorn
  • L Bystritskaya
  • AJ Campbell
  • S Caron
  • F Cassol-Brunner
  • K Cerny
  • V Chekelian
  • JG Contreras
  • YR Coppens
  • JA Coughlan
  • BE Cox
  • G Cozzika
  • J Cvach
  • JB Dainton
  • WD Dau
  • K Daum
  • B Delcourt
  • R Demirchyan
  • A De Roeck
  • K Desch
  • EA De Wolf
  • C Diaconu
  • J Dingfelder
  • V Dodonov
  • A Dubak
  • C Duprel
  • G Eckerlin
  • V Efremenko
  • S Egli
  • R Eichler
  • F Eisele
  • M Ellerbrock
  • E Elsen
  • W Erdmann
  • PJW Faulkner
  • L Favart
  • A Fedotov
  • R Felst
  • J Ferencei
  • M Fleischer
  • P Fleischmann
  • Y Fleming
  • G Flucke
  • G Flugge
  • A Fomenko
  • I Foresti
  • J Formanek
  • G Franke
  • G Frising
  • E Gabathuler
  • K Gabathuler
  • E Garutti
  • J Garvey
  • J Gayler
  • R Gerhards
  • C Gerlich
  • S Ghazaryan
  • S Ginzburgskaya
  • L Goerlich
  • N Gogitidze
  • S Gorbounov
  • C Grab
  • H Grassler
  • T Greenshaw
  • M Gregori
  • G Grindhammer
  • C Gwilliam
  • D Haidt
  • L Hajduk
  • J Haller
  • Magnus Hansson
  • G Heinzelmann
  • RCW Henderson
  • H Henschel
  • O Henshaw
  • G Herrera
  • I Herynek
  • RD Heuer
  • M Hildebrandt
  • KH Hiller
  • P Hoting
  • D Hoffmann
  • R Horisberger
  • A Hovhannisyan
  • M Ibbotson
  • M Ismail
  • M Jacquet
  • L Janauschek
  • X Janssen
  • V Jemanov
  • Leif Jönsson
  • DP Johnson
  • Hannes Jung
  • D Kant
  • M Kapichine
  • M Karlsson
  • J Katzy
  • N Keller
  • IR Kenyon
  • C Kiesling
  • M Klein
  • C Kleinwort
  • T Klimkovich
  • T Kluge
  • G Knies
  • Albert Knutsson
  • B Koblitz
  • V Korbel
  • P Kostka
  • R Koutouev
  • A Kropivnitskaya
  • J Kroseberg
  • K Kruger
  • J Kuckens
  • MPJ Landon
  • W Lange
  • T Lastovicka
  • P Laycock
  • A Lebedev
  • B Leissner
  • R Lemrani
  • V Lendermann
  • S Levonian
  • L Lindfeld
  • K Lipka
  • B List
  • E Lobodzinska
  • N Loktionova
  • R Lopez-Fernandez
  • V Lubimov
  • H Lueders
  • D Luke
  • T Lux
  • L Lytkin
  • A Makankine
  • N Malden
  • E Malinovski
  • S Mangano
  • P Marage
  • J Marks
  • R Marshall
  • M Martisikova
  • HU Martyn
  • SJ Maxfield
  • D Meer
  • A Mehta
  • K Meier
  • AB Meyer
  • H Meyer
  • J Meyer
  • S Mikocki
  • I Milcewicz-Mika
  • D Milstead
  • A Mohamed
  • F Moreau
  • A Morozov
  • JV Morris
  • MU Mozer
  • K Muller
  • P Murin
  • V Nagovizin
  • K Nankov
  • B Naroska
  • J Naumann
  • T Naumann
  • PR Newman
  • C Niebuhr
  • A Nikiforov
  • D Nikitin
  • G Nowak
  • M Nozicka
  • R Oganezov
  • B Olivier
  • JE Olsson
  • D Ozerov
  • A Paramonov
  • C Pascaud
  • GD Patel
  • M Peez
  • E Perez
  • A Perieanu
  • A Petrukhin
  • D Pitzl
  • R Placakyte
  • R Poschl
  • B Portheault
  • B Povh
  • N Raicevic
  • P Reimer
  • B Reisert
  • A Rimmer
  • C Risler
  • E Rizvi
  • P Robmann
  • B Roland
  • R Roosen
  • A Rostovtsev
  • Z Rurikova
  • S Rusakov
  • K Rybicki
  • DPC Sankey
  • E Sauvan
  • S Schatzel
  • J Scheins
  • RP Schilling
  • P Schleper
  • S Schmidt
  • S Schmitt
  • M Schneider
  • L Schoeffel
  • A Schoning
  • V Schroder
  • HC Schultz-Coulon
  • C Schwanenberger
  • K Sedlak
  • F Sefkow
  • I Sheviakov
  • LN Shtarkov
  • Y Sirois
  • T Sloan
  • P Smirnov
  • Y Soloviev
  • D South
  • V Spaskov
  • A Specka
  • H Spitzer
  • R Stamen
  • B Stella
  • J Stiewe
  • I Strauch
  • U Straumann
  • V Tchoulakov
  • G Thompson
  • PD Thompson
  • E Tomasz
  • D Traynor
  • P Truol
  • G Tsipolitis
  • I Tsurin
  • J Turnau
  • E Tzamariudaki
  • A Uraev
  • M Urban
  • A Usik
  • D Utkin
  • S Valkar
  • A Valkarova
  • C Vallee
  • P Van Mechelen
  • N Van Remortel
  • AV Trevino
  • Y Vazdik
  • C Veelken
  • A Vest
  • S Vinokurova
  • V Volchinski
  • K Wacker
  • J Wagner
  • G Weber
  • R Weber
  • D Wegener
  • C Werner
  • N Werner
  • M Wessels
  • B Wessling
  • GG Winter
  • C Wissing
  • EE Woehrling
  • R Wolf
  • E Wunsch
  • S Xella
  • W Yan
  • V Yeganov
  • J Zacek
  • J Zalesak
  • Z Zhang
  • A Zhelezov
  • A Zhokin
  • H Zohrabyan
  • F Zomer

Summary, in English

A search for gravitinos produced in e(+/-)p collisions is performed using the H1 detector at HERA. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb(-1) for e(+)p collisions and 13.5 pb(-1) for e(-)p collisions. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings lambda' equal to 1, in some parts of the parameter space of the considered model.

Department/s

  • Particle and nuclear physics

Publishing year

2005

Language

English

Pages

31-42

Publication/Series

Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

616

Issue

1-2

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0370-2693