Direct and indirect detection of dark matter in D-6 flavor symmetric model

作者：Kajiyama Yuji^*; Okada Hiroshi; Toma Takashi

来源：European Physical Journal C, 2011, 71(8): 1688.

DOI：10.1140/epjc/s10052-011-1688-0

We study fermionic dark matter in a non-supersymmetric extension of the standard model with a family symmetry based on D-6 x (Z) over cap (2) x Z(2). In our model, the final state of the dark matter annihilation is determined to be e(+)e(-) by the flavor symmetry, which is consistent with the PAMELA result. At first, we show that our dark matter mass should be within the range of 230 GeV-750 GeV in the WMAP analysis combined with mu -> e gamma constraint. Moreover, we simultaneously explain the experiments of direct and indirect detection, by simply adding a gauge and D6 singlet real scalar field. In the direct detection experiments, we show that the lighter dark matter mass similar or equal to 230 GeV and the lighter standard model Higgs boson similar or equal to 115 GeV are in favor of the observed bounds reported by CDMS II and XENON100. In the indirect detection experiments, we explain the positron excess reported by PAMELA through the Breit-Wigner enhancement mechanism. We also show that our model is consistent with there being no antiproton excess, as suggested by PAMELA.

• 出版日期2011-8