PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - GAD - Gamma Ray Direct
Overview of the GRAMS (Gamma-Ray AntiMatter Survey) Project
T. Aramaki*, K. Aoyama, J. Asaadi, L. Fabris, Y. Ichinohe, Y. Inoue, G. Karagiorgi, D. Khamgulyan, M. Kimura, J. Leyva, R. Mukherjee, T. Nakasone, H. Odaka, K. Perez, M. Sakurai, W. Seligman, S. Takashima, M. Tanaka, N. Tsuji, H. Yoneda, K. Yorita and J. Zeng
Full text: pdf
Pre-published on: July 07, 2021
Published on: March 18, 2022
GRAMS (Gamma-Ray and AntiMatter Survey) is a next-generation proposed balloon/satellite mission that will be the first to target both MeV gamma-ray observations and antimatter-based indirect dark matter searches with a LArTPC (Liquid Argon Time Projection Chamber) detector. Astrophysical observations at MeV energies have been poorly explored and long-neglected. With a cost-effective, large-scale LArTPC, a single LDB (Long-Duration Balloon) flight could provide an order of magnitude improved sensitivity compared to previous experiments. We can uniquely measure gamma rays from annihilating dark matter and evaporating primordial black holes. Additionally, GRAMS can extensively explore dark matter parameter space via antimatter measurements. In particular, low-energy antideuterons can be background-free dark matter signatures. We could deeply investigate the parameter space and validate the potential dark matter signatures suggested by the Fermi gamma-ray observations and AMS-02 antiparticle measurements.
DOI: https://doi.org/10.22323/1.395.0653
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