Author:
Liang Zheng-Liang,Zhang Ping
Abstract
Abstract
In recent years, the importance of the electronic in-medium effect
in the sub-GeV dark matter (DM) direct detection has been recognized
and a coherent formulation of the DM-electron scattering based on
the linear response theory has been well established in the literature.
In this paper, we apply the formulation to the scattering between
DM particles and solar medium, and it is found that the dynamic structure
factor inherently incorporate the particle-particle scattering and
in-medium effect. Using this tool and taking a benchmark model as
an example, we demonstrate how the in-medium effect affects the scattering
of DM particles in the Sun, in both the heavy and the light mediator
limit. Formulae derived in this work lay the foundation for accurately
calculating the spectra of solar-accelerated DM particles, which is
of particular importance for the detection of DM particles via plasmon
in semiconductor targets.
Subject
Astronomy and Astrophysics