The 2009 Europhysics Conference on High Energy Physics

Searches for excited fermions at HERA

18 Jul 2009, 12:00

15m

Large Lecture - Hall B (Kraków, Poland)

Higgs and New Physics III. Higgs and New Physics

Speaker

Mr Zhiqing Zhang (LAL Orsay)

Description

Searches for excited electrons, excited neutrinos and excited quarks are perfomed using the full $e^{\pm }p$ data sample collected by the H1 experiment at HERA, corresponding to a total luminosity of 475 pb${}^{-1}$. The electroweak decays of excited fermions into standard model fernions and $\gamma$, $Z$ or $W$ bosons are considered. No evidence for excited fermion production is found. Mass dependent exclusion limits on excited fermion production cross sections and on the ratio $f/\mathrm{\Lambda }$ of the coupling to the compositeness scale are derived within gauge mediated models.

Presentation materials

Slides

zhang-eps09-h1.pdf