Charginos and neutralinos in the light of radiative corrections: Sealing the fate of Higgsino dark matter

被引：115

作者：

Ellis, J ^{[1
]}

Falk, T

Ganis, G

Olive, KA

Schmitt, M

机构：

[1] CERN, Div TH, CH-1211 Geneva, Switzerland

[2] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[3] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[4] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[5] CERN, Div PPE, CH-1211 Geneva, Switzerland

来源：

PHYSICAL REVIEW D | 1998年 / 58卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.58.095002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the CERN LEP constraints from searches for charginos chi(+/-) and neutralinos chi(i), taking into account radiative corrections to the relations between their masses and the underlying Higgs-mixing and gaugino-mass parameters mu, m(1/2), and the trilinear mass parameter A(t). While radiative corrections do not alter the excluded domain in m(chi)+/- as a function of m(chi)+/- -m(chi), its mapping into the mu, m(1/2) plane is altered. We update our previous lower limits on the mass of gaugino dark matter and on tan beta, the ratio of Higgs vacuum expectation values, in light of the latest LEP data and these radiative corrections. We also discuss the viability of Higgsino dark matter, incorporating coannihilation effects into the calculation of the Higgsino relic abundance. We find that Higgsino dark matter is viable for only a very limited range of mu and m(1/2), which will be explored completely by upcoming LEP runs. [S0556-2821(98)03317-7].

引用

页数：10

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