arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0710.3791hep-ph
收藏

超对称模型的新约束

New constraints on supersymmetric models from b -> s gamma

F. Mahmoudi

摘要:

我们分析了几种超对称破缺方案的参数空间,如最小超引力(mSUGRA)模型和非普适Higgs质量(NUHM)框架,以及反常介导的超对称破缺(AMSB)和规范介导的超对称破缺(GMSB)模型,根据在b -> s伽马跃迁中的一个新的可观察性,也就是说,在排他性的B -> K* γ衰变中的同位旋对称性破缺。我们发现,在许多情况下,这个观察提供了严格的限制,所允许的参数空间区域所提到的模型。此外,我们还提供了几个超对称粒子的物理质量的调查和搜索的排除值的例子。对于所有检查的参数空间区域,这里也给出了与b -> s γ相关联的分支比的约束。并与B_s -> mu+ mu-分支比作了比较。

英文摘要:

We provide an analysis of the parameter space of several supersymmetry breaking scenarios such as the minimal supergravity (mSUGRA) model and the non universal Higgs mass (NUHM) framework, as well as the Anomaly Mediated Supersymmetry Breaking (AMSB) and the Gauge Mediated Supersymmetry Breaking (GMSB) models, in the light of a novel observable in b -> s gamma transitions, i.e. the isospin symmetry breaking in the exclusive B -> K* gamma decays. We find that in many cases, this observable provides severe restrictions on the allowed parameter space regions for the mentioned models. Moreover, we provide a few examples of investigations of the physical masses of supersymmetric particles and search for the excluded values. The constraints from the branching ratio associated to b -> s gamma are also presented here for all the examined parameter space regions. A comparison with B_s -> mu+ mu- branching ratio has also been performed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑