Document Type

Article

Publication Date

11-28-2002

Abstract

Searches in ep collisions for heavy excited fermions have been performed with the ZEUS detector at HERA. Excited states of electrons and quarks have been searched for in e+ p collisions at a centre-of-mass energy of 300 GeV using an integrated luminosity of 47.7 pb-1. Excited electrons have been sought via the decays e± → eγ, e± → eZ and e± → vW. Excited quarks have been sought via the decays q± → qγ and q± → qW. A search for excited neutrinos decaying via v± → vγ, v± → vZ and v± → eW is presented using e-p collisions at 318 GeV centre-of-mass energy, corresponding to an integrated luminosity of 16.7 pb-1. No evidence for any excited fermion is found, and limits on the characteristic couplings are derived for masses ≲250 GeV. © 2002 Elsevier Science B.V. All rights reserved.

Journal Title

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

549

Issue

1-2

First Page

32

Last Page

47

DOI

https://doi.org/10.1016/S0370-2693(02)02863-0

First Department

Physics

Acknowledgements

Open access article retrieved April 12, 2021 from https://www.sciencedirect.com/science/article/pii/S0370269302028630

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