Search for excited fermions and leptoquarks at HERA

Details Search for excited fermions and leptoquarks at HERA Search for excited fermions and leptoquarks at HERA

1999-10-04

arxiv.org/abs/hep-ex/9910012v2

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 10 figures, 2 tables. Contributed to the proceedings of "Beyond the Desert - Accelerator, Non-Accelerator and Space

Scientific paper

Recent results on searches for new particles at the electron-proton collider HERA are reported. Based on roughly 40pb-1 of e^+p data taken in the years 1994-1997, the H1 and ZEUS collaborations have derived new exclusion limits for the direct production of excited fermion states and of leptoquarks in different decay channels, including lepton-flavor violating decays. The results of searches for contact interactions further constrain the parameter space for such particles and their couplings in the high-mass regime, where direct production is kinematically prohibited. Also preliminary analyses of the e^-p data taken in 1998 and 1999 do not find signals of new physics.

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