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arXiv 0902.3826hep-phhep-exhep-th
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在LHC上搜索MSSM的量规扩展

Search for Gauge Extensions of the MSSM at the LHC

Ahmed Ali, Durmus A. Demir, Mariana Frank, Ismail Turan

摘要:

最小超对称模型(MSSM)的扩展主要是为了解决μ问题,涉及新的物质种类和规范群。这些扩展的MSSM模型可以通过规范和希格斯玻色子或它们的费米子伙伴的影响在LHC中搜索。传统上,研究的重点是新规范和希格斯玻色子在这种模型中产生的额外力。研究这种效应的另一种方法是通过物质种类和规范力的超伙伴。因此,我们考虑一个$U(1)^\prime$规范扩展的MSSM,并进行了广泛的研究,通过生产和衰变的标量夸克和胶子,预计将产生大量的LHC模型的签名。在详细研究了这种模型在LHC上的特征之后,我们对来自过程pp-> n轻子+ m喷流+ EMT的信号进行了详细的Monte Carlo分析,并将所得分布与MSSM预测的分布进行了比较。我们的结果表明,在超对称框架中寻找额外的规范相互作用不仅可以通过由规范和希格斯玻色子介导的力进行,而且可以通过由规范和希格斯费米子介导的超伙伴力进行。对夸克/胶子衰变引起的事件的分析是对LHC直接Z'搜索的补充。

英文摘要:

The extensions of the minimal supersymmetric model (MSSM), driving mainly from the need to solve the μproblem, involve novel matter species and gauge groups. These extended MSSM models can be searched for at the LHC via the effects of the gauge and Higgs bosons or their fermionic partners. Traditionally, the focus has been on the study of the extra forces induced by the new gauge and Higgs bosons present in such models. An alternative way of studying such effects is through the superpartners of matter species and the gauge forces. We thus consider a $U(1)^\prime$ gauge extension of the MSSM, and perform an extensive study of the signatures of the model through the production and decays of the scalar quarks and gluino, which are expected to be produced copiously at the LHC. After a detailed study of the distinctive features of such models with regard to the signatures at the LHC, we carry out a detailed Monte Carlo analysis of the signals from the process pp-> n leptons + m jets + EMT, and compare the resulting distributions with those predicted by the MSSM. Our results show that the searches for the extra gauge interactions in the supersymmetric framework can proceed not only through the forces mediated by the gauge and Higgs bosons but also through the superpartner forces mediated by the gauge and Higgs fermions. Analysis of the events induced by the squark/gluino decays presented here is complementary to the direct Z' searches at the LHC.

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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