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Searches for excited fermions at HERA

Abstract : 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 $f/{\Lambda}$ of the coupling to the compositeness scale are derived within gauge mediated models.
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http://hal.in2p3.fr/in2p3-00436737
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Submitted on : Thursday, January 28, 2010 - 5:29:58 PM
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EPS-HEP_2009_270.pdf
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  • HAL Id : in2p3-00436737, version 1

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Z. Zhang. Searches for excited fermions at HERA. 2009 Europhysics Conference on High Energy Physics (EPS HEP 2009), Jul 2009, Krakow, Poland. pp.270. ⟨in2p3-00436737⟩

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