H1prelim-08-161

A search for excited quarks in ep collisions at HERA

Reference Preliminary results expected for ICHEP 2008, Juli 2008
Document Conference paper or talk
Figures  (1a)  (1b)  (1c)  (1d)  (2a)  (2b)
Tables
Contact N.Trinh, E.Sauvan, G.Stoicea
Abstract A search for excited quarks is performed 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 decay of excited quarks ${q}^{*} ightarrow{q}{\gamma}$, ${q}^{*} ightarrow{q}Z$ and ${q}^{*}{ ightarrow}q W$ are considered. No evidence for excited quark production is found. Mass dependent exclusion limits on production cross sections and on the ratio of the coupling constant to the compositeness scale are derived within gauge mediated models.
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