Naturalness and GUT scale Yukawa coupling ratios in the constrained MSSM

被引：31

作者：

Antusch, Stefan ^{[1
,2
]}

Calibbi, Lorenzo ^{[2
]}

Maurer, Vinzenz ^{[1
]}

Monaco, Maurizio ^{[3
,4
]}

Spinrath, Martin ^{[3
,4
]}

机构：

[1] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[2] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany

[3] SISSA ISAS, I-34136 Trieste, Italy

[4] Ist Nazl Fis Nucl, I-34136 Trieste, Italy

来源：

PHYSICAL REVIEW D | 2012年 / 85卷 / 03期

基金：

瑞士国家科学基金会;

关键词：

QUARK MASS; BREAKING; SUPERSYMMETRY; UNIFICATION; PROGRAM; LIGHT;

D O I：

10.1103/PhysRevD.85.035025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the fine-tuning in the constrained minimal supersymmetric standard model in the light of the present and expected ATLAS and CMS searches for supersymmetry. Even with 10 fb(-1) of data and no discovery of supersymmetry valid regions might remain with fine-tuning less than 20. Moreover we investigate the fine-tuning price of grand unification scale Yukawa coupling relations. Considering a 2 sigma constraint for (g - 2)(mu) and fine-tuning less than 30 yields an allowed range of y(tau)/y(b) = [1.31, 1.70], which points towards the alternative grand unification prediction y(tau)/y(b) = 3/2. Relaxing the (g - 2)(mu) constraint to 5 sigma extends the possible region to [1.02, 1.70], allowing for approximate b - tau Yukawa coupling unification.

引用

页数：8

共 53 条

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