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Search for excited fermions at HERA |
| Reference |
Preliminary results expected for EPS 2005, Summer 2005 |
| Figures |
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| Contact |
A. Rimmer, C. Diaconu |
| Abstract |
A search for excited quarks q^* of the first generation in e^+p scattering at
the collider HERA is presented using H1 data corresponding to an integrated luminosity of
about 60 pb^(-1) accumulated in the period 1999-2000. Excited neutrinos are also searched for
using e^-p data collected in 2005.
The electroweak decays of excited fermions,
f^* -> f gamma, f W, f Z are considered and possible final states resulting from the Z
or W hadronic decays or decays into leptons of the first two generations are taken into account.
No evidence for f^* production is found. Mass dependent exclusion limits on cross-sections and
on the ratio of coupling constants to the compositeness scale are derived. |
| Links |
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