出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In R-parity violating supersymmetry a gaugino can be produced at HERA by the t-channel exchange
of a selectron between the beam positron or electron and an initial quark from the beam
proton. In the generic MSSM model the gaugino can decay in a cascade into two quarks and
an (anti)lepton. For this model a search in the e±-channel has been performed with the ZEUS
detector using combined e±p-data of Lint = 121pb−1. No deviations from the Standard Model
have been observed and exclusion limits on parameters of the MSSM have been set. Assuming
the GMSB model with the gravitino as lightest supersymmetric particle and the neutralino as
next-to-lightest supersymmetric particle, the neutralino decays into a gravitino and a high-energy
photon. For this model searches have been performed with the H1 detector using e+p-data of
Lint = 64.3pb−1 and e−p-data of Lint = 13.5pb−1 and with the ZEUS detector using e+p-data
of Lint = 65.1pb−1. No deviations from the Standard Model have been observed and limits on
the selectron and neutralino masses have been set. Additionally, limits on the R-parity violating
Yukawa coupling have been derived in the search performed with the H1 detector.
