A CoGeNT modulation analysis

Patrick J. Fox, Joachim Kopp, Mariangela Lisanti, Neal Weiner

    Research output: Contribution to journalArticle

    Abstract

    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.

    Original languageEnglish (US)
    Article number036008
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume85
    Issue number3
    DOIs
    StatePublished - Feb 15 2012

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    modulation
    halos
    demand assignment multiple access
    statistical tests
    weakly interacting massive particles
    dark matter
    energy

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    A CoGeNT modulation analysis. / Fox, Patrick J.; Kopp, Joachim; Lisanti, Mariangela; Weiner, Neal.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 85, No. 3, 036008, 15.02.2012.

    Research output: Contribution to journalArticle

    Fox, Patrick J. ; Kopp, Joachim ; Lisanti, Mariangela ; Weiner, Neal. / A CoGeNT modulation analysis. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2012 ; Vol. 85, No. 3.
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