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Implications of CoGeNT and DAMA for light WIMP dark matter

Fitzpatrick, A. Liam and Hooper, Dan and Zurek, Kathryn M. (2010) Implications of CoGeNT and DAMA for light WIMP dark matter. Physical Review D, 81 (11). Art. No. 115005. ISSN 1550-7998.

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In this paper, we study the recent excess of low energy events observed by the CoGeNT Collaboration, and discuss the possibility that these events originate from the elastic scattering of a light (m_DM ~ 5-10 GeV) weakly interacting massive particle (WIMP). We find that such a dark matter candidate may also be capable of generating the annual modulation reported by DAMA, without conflicting with the null results from other experiments, such as XENON10. The regions implied by CoGeNT and DAMA are also near those required to produce the two observed CDMS events. A dark matter interpretation of the CoGeNT and DAMA observations favors a region of parameter space that is especially attractive within the context of asymmetric dark matter models. In such models, the cosmological dark matter density arises from the baryon asymmetry of the Universe, naturally leading to the expectation that m_DM ~ 1-10 GeV. We also discuss neutralino dark matter from extended supersymmetric frameworks, such as the next-to-minimal supersymmetric standard model. Lastly, we explore the implications of such a dark matter candidate for indirect searches, and find very encouraging prospects for experiments attempting to detect neutrino or gamma ray annihilation products.

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Additional Information:© 2010 American Physical Society. (Received 7 April 2010; published 11 June 2010) We would like to thank Juan Collar for his assistance in understanding the details of the recent CoGeNT result. We also thank B. Feldstein, A. Pierce, and P. Sorensen for helpful discussions. D. H. is supported by the U.S. Department of Energy, including Grant No. DE-FG02-95ER40896, and by NASA Grant No. NAG5-10842. A. L. F. and K. M. Z. thank the KITP for their hospitality at the workshop “Direct, Indirect and Collider Signals of Dark Matter,” where parts of this work were initiated. A. L. F. is supported by DOE Grant No. DE-FG02-01ER-40676 and NSF CAREER Grant No. PHY-0645456.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-95ER40896
Department of Energy (DOE)DE-FG02-01ER-40676
Issue or Number:11
Classification Code:PACS numbers: 95.35.+d
Record Number:CaltechAUTHORS:20190613-110921155
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96371
Deposited By: George Porter
Deposited On:13 Jun 2019 19:01
Last Modified:03 Oct 2019 21:21

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