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arXiv 1306.4505hep-ph
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MSSM规范扩展$L_μ-L_τ$中的亲轻子暗物质

Leptophilic dark matter in gauged $L_μ-L_τ$ extension of MSSM

Moumita Das, Subhendra Mohanty

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16 pages, 3 figures, ref. updated, version accepted for publication in PRD
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摘要：

AMS-02观测到能量高达$\sim$ 350 GeV的正电子过剩，与PAMELA观测到的能量高达100 GeV的正电子过剩一致。没有观察到超过预期CR背景的过量反质子。我们提出了一种具有MSSM的$U(1)_{L_μ-L_τ}$规范扩展的亲轻子暗物质。暗物质是$L_μ-L_τ$高吉诺和额外的$SU(2)$单线态希格斯玻色子的费米子伙伴的混合物，它们打破了$L_μ-L_τ$对称性。我们构造了SM $\otimes U(1)_{ L_μ-L_τ}$ SUSY模型，该模型提供了正确的暗物质残余密度，并且与LHC对$Z'$的约束一致。解释PAMELA和AMS-02所需的大的暗物质湮灭截面到$μ^{+}μ^{-}$和$τ^{+}τ^{-}$是通过Breit-Wigner共振实现的。

英文摘要：

Positron excess upto energies $\sim$350 GeV has been observed by AMS-02 result and it is consistent with the positron excess observed by PAMELA upto 100 GeV. There is no observed excess of anti-protons over the expected CR background. We propose a leptophilic dark matter with an $U(1)_{L_μ-L_τ}$ gauge extension of MSSM. The dark matter is an admixture of the $L_μ-L_τ$ gaugino and fermionic partners of the extra $SU(2)$ singlet Higgs boson, which break the $L_μ-L_τ$ symmetry. We construct the SM$\otimes U(1)_{ L_μ-L_τ}$ SUSY model which provides the correct relic density of dark matter and is consistent with constrain on $Z'$ from LHC. The large dark matter annihilation cross-section into $μ^{+}μ^{-}$ and $τ^{+}τ^{-}$, needed to explain PAMELA and AMS-02 is achieved by Breit-Wigner resonance.

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