EPJ

2020 Impact factor 4.590
EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 7, 383-405
DOI 10.1007/s100529901086

Search for supersymmetry with a dominant R-parity violating $LQ{\bar D}$ coupling in $\mbox{e}^+\mbox{e}^-$collisions at centre-of-mass energies of 130GeV to 172GeV

The ALEPH Collaboration

R. Barate et al.

Laboratoire de Physique des Particules (LAPP), IN2P3-CNRS, F-74019 Annecy-le-Vieux Cedex, France

Received: 19 October 1998 / Published online: 11 February 1999

Abstract
A search for pair-production of supersymmetric particles under the assumption that R-parity is violated via a dominant $LQ{\bar D}$ coupling has been performed using the data collected by ALEPH at centre-of-mass energies of 130-172GeV. The observed candidate events in the data are in agreement with the Standard Model expectation. This result is translated into lower limits on the masses of charginos, neutralinos, sleptons, sneutrinos and squarks. For instance, for m0=500GeV$/\mathrm{c}^2$ and $\tan{\beta}=\sqrt{2}$ charginos with masses smaller than 81GeV$/\mathrm{c}^2$ and neutralinos with masses smaller than 29GeV$/\mathrm{c}^2$ are excluded at the $95\%$confidence level for any generation structure of the $LQ{\bar D}$coupling.

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