WIMP Annual Modulation with Opposite Phase in Late-Infall Halo Models

Details WIMP Annual Modulation with Opposite Phase in Late-Infall Halo Models WIMP Annual Modulation with Opposite Phase in Late-Infall Halo Models

2000-12-22

arxiv.org/abs/hep-ph/0012315v1

Phys.Rev. D64 (2001) 023504

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 5 figures

Scientific paper

10.1103/PhysRevD.64.023504

We show that in the late-infall model of our galactic halo by P. Sikivie the expected phase of the annual modulation of a WIMP halo signal in direct detection experiments is opposite to the one usually expected. If a non-virialized halo component due to the infall of (collisionless) dark matter particles cannot be rejected, an annual modulation in a dark matter signal should be looked for by experimenters without fixing the phase a-priori. Moreover, WIMP streams coming to Earth from directions above and below the galactic plane should be expected, with a characteristic pattern of arrival directions.

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