arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1102.0492hep-ph
收藏

超对称亲轻子Higgs模型的银河系中心区Gamma Ray过剩

The Galactic Center Region Gamma Ray Excess from A Supersymmetric Leptophilic Higgs Model

Gardner Marshall, Reinard Primulando

摘要:

在胡珀和古迪纳夫最近的一篇论文中,他们分析了费米伽马射线望远镜的数据,声称在银河系中心区域的发射光谱中发现了过量的伽马射线。Hooper和Goodenough认为,如果暗物质主要湮灭为τ对,那么7-10 GeV的能量湮灭暗物质的密度分布符合幂律,可以很好地解释所声称的过量。在本文中,我们通过扩展MSSM以包括四个希格斯双重态和一个标量单重态来提出这样的暗物质模型。一个Z2对称性被强加,它强制了一个汤川结构,这样上夸克、下夸克和轻子每个都从一个不同的双重态接收质量。这导致标量与轻子的耦合增强,并允许模型自然地实现所需的现象学,以解释伽马射线过剩。我们的模型产生正确的暗物质热遗迹密度,并避免碰撞边界的Z宽度的测量,以及在LEP的直接生产。

英文摘要:

In a recent paper by Hooper and Goodenough, data from the Fermi Gamma Ray Telescope was analyzed and an excess of gamma rays was claimed to be found in the emission spectrum from the Galactic Center Region. Hooper and Goodenough suggest that the claimed excess can be well explained by 7-10 GeV annihilating dark matter with a power law density profile if the dark matter annihilates predominantly to tau pairs. In this paper we present such a dark matter model by extending the MSSM to include four Higgs doublets and one scalar singlet. A Z2 symmetry is imposed that enforces a Yukawa structure so that the up quarks, down quarks, and leptons each receive mass from a distinct doublet. This leads to an enhanced coupling of scalars to leptons and allows the model to naturally achieve the required phenomenology in order to explain the gamma ray excess. Our model yields the correct dark matter thermal relic density and avoids collider bounds from measurements of the Z width as well as direct production at LEP.

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。

↑