Direct detection experiments are gaining in mass reach. Here we show that the inclusion of dark Compton scattering, which has typically been neglected in absorption searches, has a substantial impact on the reach and discovery potential of direct detection experiments at high bosonic cold dark matter masses. We demonstrate this for relic dark photons and axionlike particles: we improve expected reach across materials, and further use results from SuperCDMS, EDELWEISS, and GERDA to place enhanced limits on dark matter parameter space. We outline the implications for detector design and analysis.
Bibliographical noteFunding Information:
We thank (in alphabetical order) Eve Bodenia, Paul Brink, Torben Ferber, Camilo Garcia-Cely, Sunil Golwala, Sam McDermott, Scott Oser, Richard Partridge, and Hadar Steinberg for useful discussions. We are grateful to Rouven Essig, Torben Ferber, and Noah Kurinsky for comments on a draft version of this manuscript. The work of Y. H. is supported by the Israel Science Foundation (Grant No. 1112/17), by the Binational Science Foundation (Grant No. 2016155), by the I-CORE Program of the Planning Budgeting Committee (Grant No. 1937/12), and by the Azrieli Foundation. The work of B. v. K. is funded by the Deutsche Forschungsgemeinschaft (DFG) under the Emmy Noether Grant No. 420484612, and under Germany’s Excellence Strategy—EXC 2121, 390833306. The work of E. K. is supported by the Israel Science Foundation (Grant No. 1111/17), by the Binational Science Foundation (Grant No. 2016153), and by the I-CORE Program of the Planning Budgeting Committee (Grant No. 1937/12). T. C. Y. is supported by the U.S. Department of Energy under Contract No. DE-AC02-76SF00515.
© 2022 authors. Published by the American Physical Society.