Leif Jönsson
Professor emeritus
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