Article
A Search for Excited Fermions in e+p Collisions at HERA
Zeitschrift fur Physik C-Particles and Fields
Document Type
Article
Publication Date
12-1-1997
Disciplines
Abstract
Using the ZEUS detector at HERA, we have searched for heavy excited states of electrons, neutrinos, and quarks in e+p collisions at a center-of-mass energy of 300 GeV. With an integrated luminosity of 9.4 pb-1, no evidence was found for electroweak production and decay of such states. Limits on the production cross section times branching ratio and on the characteristic couplings, f/Λ, are derived for masses up to 250 GeV. For the particular choice f/Λ = 1/Mf*, we exclude at the 95% confidence level excited electrons with mass between 30 and 200 GeV, excited electron neutrinos with mass between 40 and 96 GeV, and quarks excited electroweakly with mass between 40 and 169 GeV. © Springer-Verlag 1997.
DOI
https://doi.org/10.1007/s002880050585
First Department
Physics
Acknowledgements
Accepted version retrieved July 20, 2021 from https://www.andrews.edu/sed/gpc/faculty-research/coffen-research/coffen_2009_600.pdf
Citation Information
J. Breitweg, M. Derrick, D. Krakauer, S. Magill, et al.. "A Search for Excited Fermions in e+p Collisions at HERA" Zeitschrift fur Physik C-Particles and Fields Vol. 76 Iss. 4 (1997) p. 631 - 646 Available at: http://works.bepress.com/margarita_mattingly/20/