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Snowmass2021 Cosmic Frontier White Paper: Puzzling Excesses in Dark Matter Searches and How to Resolve Them

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arxiv 2203.06859 v1 pith:IPN5UH4S submitted 2022-03-14 hep-ph astro-ph.HEhep-ex

Snowmass2021 Cosmic Frontier White Paper: Puzzling Excesses in Dark Matter Searches and How to Resolve Them

Rebecca K. Leane , Seodong Shin , Liang Yang , Govinda Adhikari , Haider Alhazmi , Tsuguo Aramaki , Daniel Baxter , Francesca Calore
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Regina Caputo Ilias Cholis Tansu Daylan Mattia Di Mauro Philip von Doetinchem Ke Han Dan Hooper Shunsaku Horiuchi Doojin Kim Kyoungchul Kong Rafael F. Lang Qing Lin Tim Linden Jianglai Liu Oscar Macias Siddharth Mishra-Sharma Alexander Murphy Meshkat Rajaee Nicholas L. Rodd Aditya Parikh Jong-Chul Park Maria Luisa Sarsa Evan Shockley Tracy R. Slatyer Volodymyr Takhistov Felix Wagner Jingqiang Ye Gabrijela Zaharijas Yi-Ming Zhong Ning Zhou Xiaopeng Zhou
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classification hep-ph astro-ph.HEhep-ex
keywords excessesastrophysicaldarkexcessgamma-rayincludematterresolve
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Intriguing signals with excesses over expected backgrounds have been observed in many astrophysical and terrestrial settings, which could potentially have a dark matter origin. Astrophysical excesses include the Galactic Center GeV gamma-ray excess detected by the Fermi Gamma-Ray Space Telescope, the AMS antiproton and positron excesses, and the 511 and 3.5 keV X-ray lines. Direct detection excesses include the DAMA/LIBRA annual modulation signal, the XENON1T excess, and low-threshold excesses in solid state detectors. We discuss avenues to resolve these excesses, with actions the field can take over the next several years.

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