A Search for excited fermions in electron - proton collisions at HERA
Journal
Zeitschrift f?r Physik
Journal Volume
C65
Pages
627-648
Date Issued
1994-10
Author(s)
Derrick, M.
Abstract
A search for excited states of the standard model fermions was performed using the ZEUS detector at the HERA electron-proton collider, operating at a centre of mass energy of 296 GeV. In a sample corresponding to an integrated luminosity of 0.55 pb-1, no evidence was found for any resonant state decaying into final states composed of a fermion and a gauge boson. Limits on the coupling strength times branching ratio of excited fermions are presented for masses between 50 GeV and 250 GeV, extending previous search regions significantly. © 1995 Springer-Verlag.
Type
journal article