SOLUTIONS OF THE RENORMALIZATION-GROUP EQUATIONS FOR MINIMAL SUPERGRAVITY SU(5) GRAND UNIFIED THEORY AND STRONG CONSTRAINTS ON ITS PARAMETERS

被引：17

作者：

MATSUMOTO, M

ARAFUNE, J

TANAKA, H

SHIRAISHI, K

机构：

[1] RIKKYO UNIV,FAC GEN EDUC,TOSHIMA KU,TOKYO 171,JAPAN

[2] AKITA JR COLL,AKITA,AKITA 010,JAPAN

来源：

PHYSICAL REVIEW D | 1992年 / 46卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.46.3966

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A minimal N = 1 supergravity SU(5) grand unified theory (GUT) is studied for a heavy top-quark mass (m(t) greater-than-or-equal-to 90 GeV). Renormalization-group equations are solved without neglecting the Yukawa couplings for the third generation of quarks and leptons. The solutions for mass parameters are expressed as linear combinations of the initial-value parameters of the model at the GUT scale and the coefficients are numerically obtained. This semianalytical expression of the solutions makes it easy to use the results for low-energy phenomenology. Approximate analytical solutions valid for small tanbeta ( < 8) are also given. Combining theoretical considerations with experimental restrictions due to the CERN e+e- collider LEP, the Collider Detector at Fermilab (CDF), and the proton decay experiments of Kamiokande, we can show that the very limited supersymmetric parameter space remains allowed.

引用

页码：3966 / 3980

页数：15

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