Two Component Dark Matters in S_4×Z_2 Flavor Symmetric Extra U(1)(Particles and Fields)

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概要

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• We study cosmic-ray anomaly observed by PAMELA based on E_6 inspired extra U(1) model with S_4×Z_2 flavor symmetry. In our model, the lightest flavon has a very long lifetime of O(10^<18>) second which is longer than the age of the universe, but not long enough to explain the PAMELA result〜O(10^<26>) sec. Such a situation could be avoidable by considering that the flavon is not the dominant component of dark matters and the dominant one is the lightest neutralino. With an appropriate parameter set, the density parameter of the dark matter and the over-abundance of the positron flux in the cosmic ray are realized at the same time. There is an interesting correlation between spectrum of positron flux and V_<MNS>. No excess of anti-proton in cosmic ray suggests that sfermions are heavier than 4TeV and the masses of the light Higgs bosons are degenerated.

• 2011-11-25

著者

• Okada Hiroshi

  Central Research Institute Ishihara Sangyo Kaisha Ltd.

• Toma Takashi

  Max-planck-institut Fur Kernphysik

• Daikoku Yasuhiro

  Institute For Theoretical Physics Kanazawa University

• Daikoku Yasuhiro

  Institute For Theoretical Physics Faculty Of Science Kanazawa University

• DAIKOKU Yasuhiro

  Institute for Theoretical Physics, Kanazawa University

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