Dark matter direct detection from the single phonon to the nuclear recoil regime
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
Engineering topics
Campbell-Deem, Brian (ORCID:0000000192960188)
Publications and source records attributed to Campbell-Deem, Brian (ORCID:0000000192960188).
Multiphonon excitations from dark matter scattering in crystals
For direct detection of sub-MeV dark matter, a promising strategy is to search for individual phonon excitations in a crystal. We perform an analytic calculation of the rate for light dark matter ( keV < m DM < MeV ) to produce two acoustic phonons through scattering in cubic crystals such as GaAs, Ge, Si, and diamond. The multiphonon rate is always smaller than the rate to produce a single optical phonon, whenever the latter is kinematically accessible. In Si and diamond, there is a dark matter mass range for which multiphonon production can be the most promising process, depending on the experimental threshold.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗