H1 Collaboration, The and Henderson, Robert C. W. and Sloan, Terry (2005) Search for light gravitinos in events with photons and missing transverse momentum at HERA. Physics Letters B, 616 (1-2). pp. 31-42. ISSN 0370-2693
Full text not available from this repository.Abstract
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 λ′ equal to 1, in some parts of the parameter space of the considered model.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Physics Letters B |
| Additional Information: | Author list is partial - see original article for full author list. |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 10148 |
| Deposited By: | Ms Margaret Calder |
| Deposited On: | 07 Jul 2008 14:36 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 14:44 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/10148 |
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