Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Search for charginos and neutralinos in $e^+ e^-$ collisions at center-of-mass energies near 183-GeV and constraints on the MSSM parameter space
AU - ALEPH Collaboration, The
AU - Barate, R.
AU - Betteridge, Andrew
AU - Bowdery, Christopher
AU - Colrain, Paul
AU - Finch, Alexander
AU - Foster, Frank
AU - Hughes, Gareth
AU - Jones, Roger
AU - Williams, Mark
PY - 1999/11
Y1 - 1999/11
N2 - Searches for charginos and neutralinos are performed with the data collected by the ALEPH detector at LEP at centre-of-mass energies near 183 GeV. In these searches, it is assumed that R-parity is conserved and that the lightest neutralino is the LSP. No evidence of a signal is observed in the 57 pb −1 accumulated, which excludes chargino and associated neutralino production up to the kinematic limit over large regions of the MSSM parameter space. Under the assumptions of common gaugino and common sfermion masses at the unification scale, the interplay between the chargino, neutralino and slepton exclusion limits allows a lower bound of 27 GeV/ c2 to be set on the mass of the lightest neutralino. Tighter constraints on the MSSM parameter space are obtained using in addition exclusions in the Higgs sector. Finally, the results are interpreted within the framework of minimal supergravity.
AB - Searches for charginos and neutralinos are performed with the data collected by the ALEPH detector at LEP at centre-of-mass energies near 183 GeV. In these searches, it is assumed that R-parity is conserved and that the lightest neutralino is the LSP. No evidence of a signal is observed in the 57 pb −1 accumulated, which excludes chargino and associated neutralino production up to the kinematic limit over large regions of the MSSM parameter space. Under the assumptions of common gaugino and common sfermion masses at the unification scale, the interplay between the chargino, neutralino and slepton exclusion limits allows a lower bound of 27 GeV/ c2 to be set on the mass of the lightest neutralino. Tighter constraints on the MSSM parameter space are obtained using in addition exclusions in the Higgs sector. Finally, the results are interpreted within the framework of minimal supergravity.
U2 - 10.1007/s100520050627
DO - 10.1007/s100520050627
M3 - Journal article
VL - 11
SP - 193
EP - 216
JO - The European Physical Journal C (EPJ C) - Particles and Fields
JF - The European Physical Journal C (EPJ C) - Particles and Fields
SN - 1434-6052
IS - 2
ER -