The upcoming GRAMS (Gamma-Ray and AntiMatter Survey) experiment aims to provide unprecedented
sensitivity to a poorly explored region of the cosmic gamma-ray spectrum from
0.1-100 MeV, often referred to as the “MeV gap”. Utilizing Liquid Argon Time Projection
Chamber (LArTPC) technology to detect these MeV gamma rays, GRAMS has the potential to
uncover crucial details behind a variety of processes in multi-messenger astrophysics. Various
theories on particle interactions beyond the standard model predict that dark matter annihilations
may contribute to the cosmic gamma spectrum via monochromatic gamma emissions (spectral
lines), the annihilation of decay products, and the radiation of electromagnetically charged final
states (FSR). MeV gamma rays may also be emitted from primordial black holes (PBHs) that are
currently gaining interest as candidates for dark matter. By looking for the Hawking radiation
from such objects, GRAMS can likely probe for ultra-light PBHs, which theoretically may comprise
the majority of dark matter seen in the Universe. Here, we will describe how the analyses
of the targeted gamma-ray regime will enable GRAMS to uniquely and complementarily place
constraints on low-mass dark matter models.