INFLUENCE OF LIGHT AND HEAVY THRESHOLDS ON SUSY UNIFICATION

被引：12

作者：

BASTEROGIL, M

PEREZMERCADER, J

机构：

[1] CSIC,INST MATEMAT & FIS FUNDAMENTAL,E-28006 MADRID,SPAIN

[2] LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545

来源：

PHYSICS LETTERS B | 1994年 / 322卷 / 04期

关键词：

D O I：

10.1016/0370-2693(94)91165-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper we study and compare SUSY unification using two different approaches in order to take into account the effect of light particle thresholds on the evolution of gauge couplings: the step-function approximation, on the one hand, and a mass dependent procedure, which gives a more accurate description of the dependence of the results on the masses, on the other. We also include the effect of heavy thresholds, when SU(5) is chosen as the unifying group. We find that the mass-dependent procedure excludes scenarios where all SUSY masses are below 1 TeV, and favors a value Of alpha3(m(Z)) near its upper experimental bound, contrary to the results obtained with the step-function approximation. We underline the dependence of the results on the procedure chosen to deal with light thresholds.

引用

页码：355 / 362

页数：8

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