1306.4505 (Moumita Das et al.)

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

Moumita Das, Subhendra Mohanty

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 $U(1)_{L_{\mu}-L_{\tau}}$ gauge extension of MSSM. The dark matter is an admixture of the $L_{\mu}-L_{\tau}$ gaugino and fermionic partners of the extra SU(2) singlet Higgs boson, which break the $L_{\mu}-L_{\tau}$ symmetry. We construct the SM$\otimes U(1)_{L_{\mu}-L_{\tau}}$ 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 $\mu^{+}\mu^{-}$ and $\tau^{+}\tau^{-}$, needed to explain PAMELA and AMS-02 is achieved by Breit-Wigner resonance.

View original: http://arxiv.org/abs/1306.4505