STRING UNIFICATION AND THRESHOLD CORRECTIONS

被引：45

作者：

MAYR, P ^{[1
]}

NILLES, HP ^{[1
]}

STIEBERGER, S ^{[1
]}

机构：

[1] MAX PLANCK INST PHYS & ASTROPHYS,WERNER HEISENBERG INST,D-80805 MUNICH,GERMANY

来源：

PHYSICS LETTERS B | 1993年 / 317卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(93)91569-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The interpretation of the apparent unification of gauge couplings within supersymmetric theories depends on uncertainties induced through heavy particle thresholds. While in standard grand unified theories these effects can be estimated easily, the corresponding calculations are quite complicated in string unified theories and do exist only in models with unbroken E6. We present results for heavy particle thresholds in more realistic models with gauge group SU(3) x SU(2) x U(1). Effects of Wilson line background fields as well as the universal part of the (rather mild) threshold corrections indicate a strong model dependence. We discuss the consequences of our results for the idea of string unification without a grand unified gauge group.

引用

页码：53 / 59

页数：7

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