Supersymmetric dark matter in the light of LEP 1.5

被引：118

作者：

Ellis, J

Falk, T

Olive, KA

Schmitt, M

机构：

[1] UNIV MINNESOTA,SCH PHYS & ASTRON,MINNEAPOLIS,MN 55455

[2] CERN,DIV PPE,CH-1211 GENEVA,SWITZERLAND

来源：

PHYSICS LETTERS B | 1996年 / 388卷 / 01期

关键词：

D O I：

10.1016/0370-2693(96)01130-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the lower limit on the mass of the neutralino chi that can be obtained by combining data from e(+)e(-) annihilation at LEP and elsewhere with astrophysical and theoretical considerations. Loopholes in the purely experimental analysis of ALEPH data from the Z(0) peak and LEP 1.5, which appear when mu < 0 for certain values of the sneutrino mass m(v) and the ratio tan beta of supersymmetric Higgs vacuum expectation values, may be largely or totally excluded by data from lower-energy e(+)e(-) experiments, the hypothesis that most of the cosmological dark matter consists of chi particles, and the assumption that electroweak symmetry breaking is triggered by radiative corrections due to a heavy top quark. The combination of these inputs imposes m chi greater than or equal to 21.4 GeV, if soft supersymmetry-breaking masses are assumed to be universal at the grand-unification scale.

引用

页码：97 / 105

页数：9

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