High $Q^2$ Physics at HERA and Searches for New Particles
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Preliminary results from H1 and ZEUS on Deep Inelastic Scattering (DIS) at high momentum transfer squared $Q^2$ are presented. Used are all available $e^+ p$ data accumulated by the H1 and ZEUS experiments between 1994 and 1997, corresponding to integrated luminosities of $37 {pb}^{-1}$ and $47 {pb}^{-1}$, respectively. The anomalies observed at high $Q^2$ in the 1994 to 1996 data still remain, though with less significance. Since this high $Q^2$ domain represents a new frontier in DIS, the same data are used to search for new particles possessing direct couplings to lepton-quark pairs. Assuming that the slight excess of events observed in Neutral Current DIS is due to a statistical fluctuation, preliminary limits on the production of leptoquarks and of squarks in R-parity violating MSSM are presented.
14 pages, 12 figures, uses iopart style files, contribution to the 3rd UK Phenomenology Workshop on HERA Physics, Durham, Sep 1998
14 pages, 12 figures, uses iopart style files, contribution to the 3rd UK Phenomenology Workshop on HERA Physics, Durham, Sep 1998