Absolute mass lower limit for the lightest neutralino of the MSSM from e+ e- data at s**(1/2) up to 209-GeV

Schael, S. and Bouhova-Thacker, E. V. and Bowdery, C. K. and Finch, A. J. and Jones, Roger W. L. and Hughes, Gareth and Smizanska, Maria and ALEPH, collaboration (2004) Absolute mass lower limit for the lightest neutralino of the MSSM from e+ e- data at s**(1/2) up to 209-GeV. Physics Letters B, B583 (3-4). pp. 247-263. ISSN 0370-2693

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Abstract

Charginos and neutralinos are searched for in the data collected by the ALEPH experiment at LEP for centre-of-mass energies up to 209 GeV. The negative result of these searches is combined with those from searches for sleptons and Higgs bosons to derive an absolute lower limit of 43.1 GeV/c2 on the mass of the lightest supersymmetric particle (LSP), assumed to be the lightest neutralino. This limit is obtained in the framework of the MSSM with R-parity conservation and with gaugino and sfermion mass unification at the GUT scale and assuming no mixing in the stau sector. The LSP limit degrades only slightly to 42.4 GeV/c2 if stau mixing is considered. Within the more constrained framework of minimal supergravity, the limit is 50 GeV/c2.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
?? nuclear and high energy physicsqc physics ??
ID Code:
26331
Deposited By:
Deposited On:
30 Apr 2009 14:17
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2024 10:27