Improving the fine tuning in models of low energy gauge mediated supersymmetry breaking

被引：60

作者：

Agashe, K

Graesser, M

机构：

[1] Theoretical Physics Group, Enrest Orlando Lawrence Berkeley N., University of California, Berkeley

来源：

NUCLEAR PHYSICS B | 1997年 / 507卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

supersymmetry phenomenology; gauge mediated supersymmetry breaking; grand unified model building;

D O I：

10.1016/S0550-3213(97)00569-5

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The fine tuning in models of low energy gauge mediated supersymmetry breaking required to obtain the correct Z mass is quantified. To alleviate the fine tuning problem, a model with split (5 + (5) over bar) messenger fields is presented. This model has additional triplets in the low energy theory which get a mass of O(500) GeV from a coupling to a singlet. The improvement in fine tuning is quantified and the spectrum in this model is discussed. The same model with the above singlet coupled to the Higgs doublers to generate the mu term is also discussed. A Grand Unified version of the model is constructed and a known doublet-triplet splitting mechanism is used to split the messenger (5 + (5) over bar)'s A complete model is presented and some phenomenological constraints are discussed. (C) 1997 Elsevier Science B.V.

引用

页码：3 / 34

页数：32

共 37 条

[1]

ADAM W, CERNPPE96119

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