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, 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

Read on arXiv

arXiv

2203.06859

Date

2022-03-14

Frontier

Cosmic Frontier (CF)

Topical groups

Submitted by

Rebecca Leane

Abstract

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.