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
10.1016/S0370-2693(02)02863-0
First Department
Physics
Recommended Citation
Chekanov, S.; Derrick, M.; Krakauer, D.; Magill, S.; Musgrave, B.; Pellegrino, A.; Repond, J.; Yoshida, R.; Mattingly, Margarita C. K.; Antonioli, P.; Bari, G.; Basile, M.; Bellagamba, L.; Boscherini, D.; Bruni, A.; Bruni, G.; Cara Romeo, G.; Cifarelli, L.; Cindolo, F.; Contin, A.; Corradi, M.; De Pasquale, S.; Giusti, P.; Iacobucci, G.; Levi, G.; Margotti, A.; Massam, T.; Nania, R.; Palmonari, F.; Pesci, A.; and Sartorelli, G., "Searches for Excited Fermions in ep Collisions at HERA" (2002). Faculty Publications. 2212.
https://digitalcommons.andrews.edu/pubs/2212
Acknowledgements
Open access article retrieved April 12, 2021 from https://www.sciencedirect.com/science/article/pii/S0370269302028630