Light Dark Matter, Light Higgs and the Electroweak Phase Transition

Details Light Dark Matter, Light Higgs and the Electroweak Phase Transition Light Dark Matter, Light Higgs and the Electroweak Phase Transition

2012-01-22

arxiv.org/abs/1201.4614v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 6 figures, typos and references corrected

Scientific paper

We propose a minimal extension of the Standard Model by two real singlet fields that could provide a good candidate for light Dark Matter, and give a strong first order electroweak phase transition. As a result, there are two Higgs bosons; one is lighter than 140 GeV, and the other one with mass in the range: 280- 350 GeV and which are consistent with electroweak precision tests. We show that the lightest Higgs mass can be as small as 35 GeV while still being consistent with the LEP data. The predicted dark matter scattering cross section is large enough to accommodate CoGeNT and be can probed by future XENON experiment. We also show that for dark matter with mass around 2 GeV, the branching fraction of the process (B^{+}->K^{+} + 2(DM)) can be accessible in SuperB factories.

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