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Abstract: A search for excited quarks is performed using the full ep data samplecollected by the H1 experiment at HERA, corresponding to a total integratedluminosity of 475 pb^-1. The electroweak decays of excited quarks q* -> qgamma, q* -> q Z and q* -> q W with subsequent hadronic or leptonic decays ofthe W and Z bosons are considered. No evidence for first generation excitedquark production is found. Mass dependent exclusion limits on q* productioncross sections and on the ratio f-Lambda of the coupling to the compositenessscale are derived within gauge mediated models. These limits extend theexcluded region compared to previous excited quark searches.



Author: H1 Collaboration

Source: https://arxiv.org/







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