arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1206.2639hep-phastro-ph.CO
收藏

来自NMSSM暗物质湮灭的130 GeV光子线

A 130 GeV photon line from dark matter annihilation in the NMSSM

Debottam Das, Ulrich Ellwanger, Pantelis Mitropoulos

摘要:

在次最小超对称标准模型中,中性伴子暗物质可以通过s通道中CP奇希格斯玻色子的交换而湮灭为一对光子。CP奇希格斯玻色子玻色子通过一个主要是类希格斯玻色子的电荷环与两个光子耦合。我们发现NMSSM的参数空间可以同时容纳i)质量约为130 GeV的类中性子暗物质,产生130 GeV的光子线; ii)大于或等于10 ^{-27} cm ^3 s ^{-1}的湮灭截面; iii)符合WMAP约束的遗迹密度; iv)与氙100的边界相容的直接检测截面,以及v)大约125 GeV的类似希格斯质量的标准模型。然而,CP奇数希格斯质量必须偶然接近260 GeV。

英文摘要:

In the Next-to-Minimal Supersymmetric Standard Model, neutralino dark matter can annihilate into a pair of photons through the exchange of a CP-odd Higgs boson in the s-channel. The CP-odd Higgs boson couples to two photons through a loop of dominantly higgsino-like charginos. We show that the parameter space of the NMSSM can accommodate simultaneously i) neutralino-like dark matter of a mass of about 130 GeV giving rise to a 130 GeV photon line; ii) an annihilation cross section of or larger than 10^{-27}cm^3s^{-1}; iii) a relic density in agreement with WMAP constraints; iv) a direct detection cross section compatible with bounds from XENON100, and v) a Standard Model like Higgs mass of about 125 GeV. However, the CP-odd Higgs mass has to lie accidentally close to 260 GeV.

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。

↑