Search for excited electrons at HERA

Adloff, C.; Andreev, V.; Andrieu, B.; Anthonis, T.; Astvatsatourov, A.; Babaev, A.; Bahr, J.; Baranov, P.; Barrelet, E.; Bartel, W.

doi:10.1016/S0370-2693(02)02764-8

Search for excited electrons at HERA

H1

Collaboration

Jul, 2002

14 pages

Published in:

Phys.Lett.B 548 (2002) 35-44

e-Print:

hep-ex/0207038 [hep-ex]

DOI:

10.1016/S0370-2693(02)02764-8

Report number:

DESY-02-096

Experiments:

DESY-HERA-H1

View in:

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Abstract:

A search for excited electron e* production is described in which the electroweak decays e*->e gamma, e*->e Z and e*->nu W are considered. The data used correspond to an integrated luminosity of 120 pb^(-1) taken in e^(+-)p collisions from 1994 to 2000 with the H1 detector at HERA at centre-of-mass energies of 300 and 318 GeV. No evidence for a signal is found. Mass dependent exclusion limits are derived for the ratio of the couplings to the compositeness scale, f/Lambda. These limits extend the excluded region to higher masses than has been possible in previous direct searches for excited electrons.

Note:

13 pages, 4 figures, 1 table Report-no: DESY 02-096

positron p: colliding beams
electron p: colliding beams
new particle: search for
e*
excited state: decay modes
intermediate boson: hadronic decay
channel cross section: branching ratio
upper limit
H1
experimental results

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