A CoGeNT modulation analysis

Fox P.J.; Kopp J.; Lisanti M.Weiner N.

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A CoGeNT modulation analysis

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We analyze the recently released CoGeNT data with a focus on their time-dependent properties. Using a variety of statistical tests, we confirm the presence of modulation in the data, and find a significant component at high (E _(ee) 1.5keVee) energies. We find that standard elastic WIMPs in a Maxwellian halo do not provide a good description of the modulation. We consider the possibility of nonstandard halos, using halo-independent techniques, and find a good agreement with the DAMA modulation for Q _(Na) 0.3, but disfavoring interpretations with Q _(Na)=0.5. The same techniques indicate that CDMS-Ge should see an O(1) modulation, and XENON100 should have seen 10-30 events (based upon the modulation in the 1.5-3.1 keVee range), unless L _(eff) is smaller than recent measurements. Models such as inelastic dark matter provide a good fit to the modulation, but not the spectrum. We note that tensions with XENON could be alleviated in such models if the peak is dominantly in April, when XENON data are not available due to noise.

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《Physical review, D. Particles, fields, gravitation, and cosmology》 |2012年第3期|036008-1-036008-17|共17页
作者
Fox P.J.; Kopp J.; Lisanti M.Weiner N.;
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Theoretical Physics Department, Fermi National Accelerator Laboratory, Batavia, IL, United States;

PCTS, USAPrinceton University, Princeton, NJ 08540, United States;

Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, NY, United States;

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中图分类粒子物理学;
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A CoGeNT modulation analysis

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