HIGGS EFFECTS ON THE RELIC SUPERSYMMETRIC PARTICLE DENSITY

被引：47

作者：

ELLIS, J

ROSZKOWSKI, L

LALAK, Z

机构：

[1] TEXAS A&M UNIV SYST,DEPT PHYS,CTR THEORET PHYS,COLLEGE STN,TX 77843

[2] HOUSTON ADV RES CTR,ASTROPARTICLE PHYS GRP,THE WOODLANDS,TX 77381

[3] UNIV WARSAW,DEPT PHYS,PL-00681 WARSAW,POLAND

来源：

PHYSICS LETTERS B | 1990年 / 245卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(90)90688-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore in the minimal supersymmetric extension of the standard model the effects of Higgs exchange on the cosmological relic density ρ{variant} ̃ of the lightest supersymmetric particle (LSP), taking into account the constraints on the supersymmetric Higgs masses imposed by LEP. We find in general a significant enlargement of the region of parameter space in which ρ{variant} ̃< ρ{variant} ̃70 = 10-29 g cm-3, the closure density if the Hubble constant is 70 km s-1 Mpc-1. This effect is potentially important if the ratio of Higgs VEVs tan β ≡ υt υb≈2-4 as in many realistic models. The restricted region of parameter space in which closure density is obtained for a Hubble constant between 50 and 70 km s-1 Mpc-1 is particularly sensitive to the Higgs contribution. © 1990.

引用

页码：545 / 555

页数：11

共 33 条

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