分裂超对称模型中顶层 Yukawa 耦合的红外固定点
高能物理 - 唯象学
2009-11-11 v3
摘要
详细研究了最小分裂超对称模型中顶层 Yukawa 耦合 的红外固定点解对参数空间的严苛约束。讨论时结合Tevatron测量的顶夸子质量值以及LEP所确定的最轻希格斯质量下界。 和 gaugino 耦合强度 , 对于 值在Landau极点附近的敏感依赖性是一项值得注意的发现。尽管如此,由于需要低上限 的要求,使得该模型在红外固定点情景下受到排斥。
引用
@article{arxiv.hep-ph/0502052,
title = {Infrared fixed point of the top Yukawa coupling in split supersymmetry},
author = {Katri Huitu and Jari Laamanen and Probir Roy and Sourov Roy},
journal= {arXiv preprint arXiv:hep-ph/0502052},
year = {2009}
}
备注
Revtex4, 16 pages including EPS figures. A few references added and the relationship between the upper bound on tan_\beta and fine tuning amplified. Typos in the RGEs given in the appendix corrected. Version to be published in Phys. Rev. D