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arXiv 1012.5114hep-ph
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E(6)SSM中新的Higgs衰变和暗物质

Novel Higgs Decays and Dark Matter in the E(6)SSM

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

摘要:

特殊超对称(SUSY)标准模型预测了三个希格斯二重态和三个希格斯单线态的家庭,其中一个家庭发展真空期望值(VEV),而其余两个不被称为惰性。如果两个最轻的惰性中性伴子(仅次于最轻的超对称粒子)的质量接近Z质量的一半,那么这个模型就可以解释暗物质遗迹的丰度。在这种情况下,我们发现,通常的SM类希格斯玻色子玻色子衰变到LSP或NLSP的时间超过95%。后一种情况产生包含两个轻子l^{+}l^{-}的最终态,其不变质量小于或约为10 GeV。我们用一组满足现象学约束的基准点和WMAP暗物质遗迹丰度来说明这种情况。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,大LSP直接检测截面接近目前的限制和观察很快在氙100。

英文摘要:

The Exceptional Supersymmetric (SUSY) Standard Model predicts three families of Higgs doublets plus three Higgs singlets, where one family develops vacuum expectation values (VEVs), while the remaining two which do not are called Inert. The model can account for the dark matter relic abundance if the two lightest Inert neutralinos, identified as the (next-to) lightest SUSY particles ((N)LSPs), have masses close to half the Z mass. In this case we find that the usual SM-like Higgs boson decays more than 95% of the time into either LSPs or NLSPs. The latter case produces a final state containing two leptons l^{+}l^{-} with an invariant mass less than or about 10 GeV. We illustrate this scenario with a set of benchmark points satisfying phenomenological constraints and the WMAP dark matter relic abundance. This scenario also predicts other light Inert chargino and neutralino states below 200 GeV, and large LSP direct detection cross-sections close to current limits and observable soon at XENON100.

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