Search for supersymmetry with a dominant R-parity violating LQ $D$ coupling in $e^+ e^-$ collisions at center-of-mass energies of 130-GeV to 172-GeV

ALEPH Collaboration, The and Barate, R. and Betteridge, Andrew and Bowdery, Christopher and Colrain, Paul and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Williams, Mark (1999) Search for supersymmetry with a dominant R-parity violating LQ $D$ coupling in $e^+ e^-$ collisions at center-of-mass energies of 130-GeV to 172-GeV. The European Physical Journal C (EPJ C) - Particles and Fields, 7 (3). pp. 383-405. ISSN 1434-6052

Abstract

A search for pair-production of supersymmetric particles under the assumption that R-parity is violated via a dominant LQD¯ coupling has been performed using the data collected by ALEPH at centre-of-mass energies of 130–172 GeV. 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=500 GeV /c2 and tanβ=2√ charginos with masses smaller than 81 GeV /c2 and neutralinos with masses smaller than 29 GeV /c2 are excluded at the 95% confidence level for any generation structure of the LQD¯ coupling.