arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1109.4972hep-phastro-ph.CO
收藏

E6SSM中的非标准Higgs衰变和暗物质

Nonstandard Higgs Decays and Dark Matter in the E6SSM

J. P. Hall, S. F. King, R. Nevzorov, S. Pakvasa, M. Sher

摘要:

本文研究了超对称标准模型(E6 SSM)中最轻的希格斯玻色子的衰变。E6 SSM预测了三个类希格斯双重态和三个带U(1)_{N}电荷的SM单态。一个类希格斯二重态和一个SM单重态的家庭开发真空期望值。其他类希格斯场和SM单线态的费米子伙伴形成惰性中性伴子和电荷伴子态。两个最轻的惰性中性伴子往往是最轻和次轻的超对称粒子(LSP和NLSP)。如果最轻的惰性中性伴子的质量接近Z质量的一半,则所考虑的模型可以解释暗物质遗迹的丰度。在这种情况下,通常的类SM希格斯玻色子在95%以上的时间内衰变为LSP或NLSP。因此,最轻的希格斯玻色子衰变为l^{+} l^{-} + X的过程可能在希格斯玻色子的搜寻中起着至关重要的作用。这种情况下还预测其他轻惰性电荷伴子和中性伴子状态低于200 GeV和大LSP直接检测截面的边缘上的可观测性的氙100。

英文摘要:

We study the decays of the lightest Higgs boson within the exceptional supersymmetric (SUSY) standard model (E6SSM). The E6SSM predicts three families of Higgs-like doublets plus three SM singlets that carry U(1)_{N} charges. One family of Higgs-like doublets and one SM singlet develop vacuum expectation values. The fermionic partners of other Higgs-like fields and SM singlets form inert neutralino and chargino states. Two lightest inert neutralinos tend to be the lightest and next-to-lightest SUSY particles (LSP and NLSP). The considered model can account for the dark matter relic abundance if the lightest inert neutralino has mass close to half the Z mass. In this case the usual SM-like Higgs boson decays more than 95% of the time into either LSPs or NLSPs. As a result the decays of the lightest Higgs boson into l^{+} l^{-} + X might play an essential role in the Higgs searches. This scenario also predicts other light inert chargino and neutralino states below 200 GeV and large LSP direct detection cross-sections which is on the edge of observability of XENON100.

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。

↑