Little SUSY hierarchy in mixed modulus-anomaly mediation
Little SUSY hierarchy in mixed modulus-anomaly mediation
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DOI：
10.1016/j.physletb.2005.11.078
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发表时间：
2005-08
影响因子：
4.4
通讯作者：
Kiwoon Choi;K. Jeong;Tatsuo C. Kobayashi;Ken-ichi Okumura
中科院分区：
文献类型：
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作者：
Kiwoon Choi;K. Jeong;Tatsuo C. Kobayashi;Ken-ichi Okumura
受KKLT弦紧化的启发，涉及超光速突破的提升势，我们研究了4D有效超引力与一般形式的提升势，重点是由此产生的混合模量异常介导的软项实现希格斯玻色子质量mHand的s粒子质量mSUSY之间的小层次结构的可能性。结果表明，对于某种提升势，异常对mH 2的贡献可以抵消随后的重整化群演化，从而使模型自然地实现了最轻Higgs玻色子质量满足实验界的小层次mH 2 <$mSUSY 2/8π 2.在这样的模型中，其他希格斯粒子的质量参数μ和B可以在不需要对参数进行严格微调的情况下达到理想的大小μ B mH，尽管引力子比希格斯玻色子重得多。这些模型自然避免了危险的超对称性和CP破坏，并预测了近简并的低能Gaugino质量，纯Higgsino LSP，以及停止和Gaugino质量之间的特定关系。
Motivated by the KKLT string compactification involving a supersymmetry-breaking uplifting potential, we examine 4D effective supergravity with a generic form of uplifting potential, focusing on the possibility that the resulting mixed modulus-anomaly mediated soft terms realize the little hierarchy between the Higgs boson masses mHand the sparticle masses mSUSY. It is noted that for some type of uplifting potential, the anomaly-mediated contribution to mH2at MGUTcan cancel the subsequent renormalization group evolution of mH2down to TeV scale, thereby the model can naturally realize the little hierarchy mH2∼mSUSY2/8π2which is desirable for the lightest Higgs boson mass to satisfy the experimental bound. In such models, the other Higgs mass parameters μ and B can have the desirable size μ∼B∼mHwithout severe fine-tuning of parameters, although the gravitino is much heavier than the Higgs boson. Those models for the little hierarchy avoid naturally the dangerous SUSY flavor and CP violations, and predict nearly degenerate low energy gaugino masses, pure Higgsino LSP, and also a specific relation between the stop and gaugino masses.