|
Searches for the Lightest Supersymmetric Particle (LSP)
are performed under the assumption that R-parity
is violated via a single dominant LLE,
LQD or UDD
coupling. Data collected by the ALEPH detector at
LEP with centre-of-mass energies from 189 GeV to
208 GeV and a total integrated luminosity of 628pb-1 are
used. Searches for direct and indirect decays of pair produced
neutralinos and charginos are carried out. In the
absence of signal, parameter space of the Minimal Supersymmetric
Standard Model is constrained and limits on the mass of the LSP are
obtained. Constraints from the Z width measurement, slepton, squark and
Higgs searches are also used to exclude parameter space.
The lower mass limits for direct decays at 95%
confidence on the LSP are 60:2 GeV/c2 ; 42:3 GeV/c2
and 25:9 GeV/c2 for LLE,
LQD or UDD
coupling respectively. The lower mass limits
for indirect decays at 95% confidence on the LSP are 58:7
GeV/c2, 44:2 GeV/c2 and 42:2
GeV/c2 for LLE,
LQD or UDD
coupling respectively. The limits are valid
for all values of m; tan b
; m0 and M2.
|
