Kavli Affiliate: Shigeki Matsumoto
| First 5 Authors: Shigeki Matsumoto, Jie Sheng, Chuan-Yang Xing, ,
| Summary:
Dark matter with mass in the crossover range between wave dark matter and
particle dark matter, around $(10^{-3},, 10^3),$eV, remains relatively
unexplored by terrestrial experiments. In this mass regime, dark matter
scatters coherently with macroscopic objects. The effect of the coherent
scattering greatly enhances the accelerations of the targets that the dark
matter collisions cause by a factor of $sim 10^{23}$. We propose a novel
torsion balance experiment with test bodies of different geometric sizes to
detect such dark matter-induced acceleration. This method provides the
strongest constraints on the scattering cross-section between the dark matter
and a nucleon in the mass range $(10^{-5}, 10^3),$eV.
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