VANISHING SQUARK AND SLEPTON MASSES IN A CLASS OF SUPERGRAVITY MODELS

被引：113

作者：

INOUE, K

KAWASAKI, M

YAMAGUCHI, M

YANAGIDA, T

机构：

[1] Department of Physics, Tohoku University

[2] Department of Physics and Astronomy, University of North Carolina, Chapel Hill

来源：

PHYSICAL REVIEW D | 1992年 / 45卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.45.328

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study a class of supergravity models where an observable sector is separated from a hidden sector in the superspace density which defines the supergravity Lagrangian. It is shown that soft supersymmetry-breaking mass terms for squarks and sleptons vanish at the tree level if the cosmological constant vanishes. Since their masses are induced by radiative corrections mostly due to gauge interactions, the sfermions with the same gauge-quantum numbers are highly degenerate in mass, which is required for the suppression of the flavor-changing neutral currents. By a numerical calculation, we find that the SU(2)L x U(1)Y gauge symmetry can be broken by quantum corrections for suitable values of the free parameters. Some phenomenological features of this model are investigated. In particular, this model predicts right-handed sleptons below 150 GeV.

引用

页码：328 / 337

页数：10

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