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arXiv 0906.0362hep-phastro-ph.HEhep-ex
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扩展的MSSM中微子作为PAMELA正电子过剩的源

Extended MSSM Neutralinos as the Source of the PAMELA Positron Excess

Dan Hooper, Tim M. P. Tait

摘要:

我们考虑一个场景中的最小超对称标准模型扩展的单重手征超场,其中中性伴子暗物质湮灭轻单重类希格斯玻色子,进行衰变为电子-正电子或μ子-反μ子对。与MSSM中的中性伴子湮灭不同,该模型可以很好地拟合PAMELA宇宙线正电子分数过剩。此外,类单态标量希格斯粒子可以诱导一个大的索末菲增强,并提供一个湮灭率足以容纳观察到的正电子过剩。

英文摘要:

We consider a scenario within the Minimal Supersymmetric Standard Model extended by a singlet chiral superfield, in which neutralino dark matter annihilates to light singlet-like Higgs bosons, which proceed to decay to either electron-positron or muon-antimuon pairs. Unlike neutralino annihilations in the MSSM, this model can provide a good fit to the PAMELA cosmic ray positron fraction excess. Furthermore, the singlet-like scalar Higgs can induce a large Sommerfeld enhancement and provide an annihilation rate sufficient to accommodate the observed positron excess.

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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