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arXiv 1204.6592hep-phastro-ph.CO
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125 Gev Higgs和暗物质对MSSM的三重态-单重态扩展

Triplet-Singlet Extension of the MSSM with a 125 Gev Higgs and Dark Matter

Tanushree Basak, Subhendra Mohanty

摘要:

研究了最小超对称标准模型通过增加一个单重态和一个超荷零SU(2)手征三重态超场的推广。三重态扇区对标量质量有额外的贡献,我们发现最轻的CP-甚至希格斯玻色子在树水平上的质量可以达到119-120 GeV,辐射校正将该值提高到125 GeV。在这个模型中,不需要停止环的显著贡献来获得所需的希格斯质量,这就解决了在大统一理论尺度下将停止质量固定到高精度的微调问题。此外,该模型给出了一个中性伴子暗物质的质量约为100 GeV,这是一个混合物的希格斯诺和特里普利诺与暗物质密度符合WMAP的意见。与核子无关的自旋散射截面为10^(-43)cm ^2,这使得它与氙100等直接探测实验的边界一致。

英文摘要:

We study the extension of Minimal Supersymmetric Standard Model by adding one singlet and one hypercharge zero SU(2) triplet chiral superfield. The triplet sector gives an additional contributions to the scalar masses and we find that the lightest CP-even Higgs boson can have a mass of 119-120 GeV at the tree level, and radiative correction raises the value to 125 GeV. In this model no significant contributions from stop loops is needed to get the required Higgs mass which alleviates the fine tuning problem of fixing the stop mass to a high precision at the GUT scale. In addition this model gives a neutralino dark matter of mass around 100 GeV which is a mixture of Higgsino and Triplino with a dark matter density consistent with WMAP observations. The spin-independent scattering cross-section with nucleons is 10^(-43) cm^2, which makes it consistent with the bounds from direct detection experiments like XENON100 and others.

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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