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arXiv 0704.1395hep-ph
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LHC标准模型B-L扩展中的Higgs和Z'唯象

Higgs and Z' Phenomenology in B-L extension of the Standard Model at LHC

W. Emam, S. Khalil

摘要:

本文介绍了标准模型低尺度U(1)B-L扩展的唯象及其在LHC中的应用。在这个模型中,我们预言了一个对应于B-L规范对称性的额外规范玻色子和一个额外的SM单重标量(重Higgs)。我们展示了一个详细的分析,除了新的规范玻色子的可能的衰变通道的重和轻希格斯衰变和生产。我们发现类SM希格斯粒子产生的截面减少了20%-30%,而衰变分支比保持不变。额外的希格斯粒子具有相对较小的横截面,Z '-> l^+ l^-的分支比约为20%,而SM结果约为3%。因此,通过LHC上干净的双轻子信号,可以找到Z'。

英文摘要:

The phenomenology of the low scale U(1)_{B-L} extension of the standard model and its implications at LHC is presented. In this model, an extra gauge boson corresponding to B-L gauge symmetry and an extra SM singlet scalar (heavy Higgs) are predicted. We show a detailed analysis of both heavy and light Higgses decay and production in addition to the possible decay channels of the new gauge boson. We find that the cross sections of the SM-like Higgs production are reduced by ~ 20%-30%, while its decay branching ratios remain intact. The extra Higgs has relatively small cross sections and the branching ratios of Z'-> l^+ l^- are of order ~20% compared to ~ 3% of the SM resuls. Hence, the search for Z' is accessible via a clean dilepton signal at 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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