Abstract
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.
| Original language | English |
|---|---|
| Article number | 653 |
| Journal | Proceedings of Science |
| Volume | 395 |
| State | Published - Mar 18 2022 |
| Event | 37th International Cosmic Ray Conference, ICRC 2021 - Virtual, Berlin, Germany Duration: Jul 12 2021 → Jul 23 2021 |
Funding
This work was supported by Tsuguo Aramaki’s start-up funds from Northeastern University. We acknowledge support from JSPS KAKENHI 610 grant numbers 20K22355 and 20H00153. We also acknowledge support from Barnard College and Columbia University.
| Funders | Funder number |
|---|---|
| Barnard College and Columbia University | |
| Tsuguo Aramaki | |
| Japan Society for the Promotion of Science | 20H00153, 20K22355 |
| Northeastern University |