Lowering alpha(s) by flipping SU(5)

被引：33

作者：

Ellis, J

Lopez, JL

Nanopoulos, DV

机构：

[1] RICE UNIV,BONNER NUCL LAB,DEPT PHYS,HOUSTON,TX 77005

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

[3] HOUSTON ADV RES CTR,ASTROPHYS PHYS GRP,THE WOODLANDS,TX 77381

来源：

PHYSICS LETTERS B | 1996年 / 371卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(95)01589-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the prediction for alpha(s)(M(z)) in flipped SU(5) is naturally lower than in minimal SU(5), and that the former can accommodate the full range of alpha(s)(M(z)) presently allowed by experiment. Our computations include two-loop (delta(2loop)) and light (delta(light)) and heavy (delta(heavy)) threshold effects. Unlike minimal SU(5), in flipped SU(5) the heavy threshold effects can naturally decrease the predicted value of a,(Mz). We also show that the value of the proton lifetime into the dominant channel p --> e(+) pi(0) is within the observable range at SuperKamiokande, and should discriminate against minimal supersymmetric SU(5), where the dominant mode is p --> <(nu)over bar K+>.

引用

页码：65 / 70

页数：6

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