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arXiv 0907.4234hep-ph
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具有非普适S费米子质量的超对称模型的LHC签名

LHC signature of supersymmetric models with non-universal sfermion masses

Sung-Gi Kim, Nobuhiro Maekawa, Keiko I. Nagao, Mihoko M. Nojiri, Kazuki Sakurai

摘要:

研究了具有非普适sfermion质量的最小超对称标准模型的LHC特征。在模型中,高金诺和SU(5)的第三代10的软质量是在弱标度附近,而其他sfermion的软质量是普遍的,在几个TeV左右。这不仅是由于味、CP和自然度约束,而且也是由于非阿贝尔水平(味)对称性的E_6大统一模型。在LHC模型的特征签名是占主导地位的事件与4 b部分子在最后的状态,以及高速率的温和提升顶夸克产生的胶子衰变。高p_T喷注也是由夸克衰变引起的。我们表明,在LHC的早期阶段发现特征签名是可能的。利用大的积分亮度,我们的方案与一些具有相似特征的CMSSM模型点的区分是可能的。本文给出了利用半球分析的专用通道测量s粒子质量的结果,以及利用M_{T2}和M_{T2} ^{min}对一些典型模型点的胶子和夸克质量的包容测量结果。

英文摘要:

We study the LHC signature of the minimal supersymmetric standard model with non-universal sfermion masses. In the model, soft masses of gauginos and the 3rd generation of 10 of SU(5) are around the weak scale, while other sfermion soft mass is universal and around a few TeV. Such sfermion mass spectrum is motivated not only from flavor, CP and naturalness constraints but also from E_6 grand unified model with non-Abelian horizontal (flavor) symmetry. The characteristic signature of the model at the LHC is the dominance of the events with 4 b partons in the final state together with high rate of mildly boosted top quark arising from gluino decay. The prominent high p_T jet also arises from squark decay. We show it is possible to find the characteristic signature in the early stage of the LHC. The discrimination of our scenario from some CMSSM model points with similar signature may be possible with large integrated luminosity. The result of sparticle mass measurement using exclusive channel with the help of hemisphere analysis, and inclusive measurement of gluino and squark masses using M_{T2} and M_{T2}^{min} in some representative model points are presented.

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。

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