NATURALLY LARGE TAN-BETA

被引：47

作者：

NELSON, AE

RANDALL, L

机构：

[1] MIT,CTR THEORET PHYS,NUCL SCI LAB,CAMBRIDGE,MA 02139

[2] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

来源：

PHYSICS LETTERS B | 1993年 / 316卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(93)91037-N

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that if there are only two Higgs doublets in the supersymmetric standard model, large tan beta requires a fine tuning in the parameters of the Lagrangian of order (1/tan beta), which cannot be explained by any approximate symmetry. With an extended Higgs sector, large tan beta can be natural. We give an explicit example with four doublets in which it is possible to achieve large tan beta as a result of an approximate symmetry, without any light superpartners. The approximate symmetry can be extended to explain all the hierarchies in the quark mass matrix.

引用

页码：516 / 520

页数：5

共 16 条

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[2]

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