Direct Constraints on Charged Excitations of Dark Matter

作者：An Haipeng^*; Pospelov Maxim; Pradler Josef

来源：Physical Review Letters, 2012, 109(25): 251302.

DOI：10.1103/PhysRevLett.109.251302

If the neutral component of weak-scale dark matter is accompanied by a charged excitation separated by a mass gap of less than similar to 20 MeV, weakly interacting massive particles (WIMPs) can form stable bound states with nuclei. We show that the recent progress in experiments searching for neutrinoless double-beta decay sets the first direct constraint on the exoergic reaction of WIMP-nucleus bound state formation. We calculate the rate for such a process in representative models and show that the double-beta decay experiments provide unique sensitivity to a large fraction of parameter space of the WIMP doublet model, complementary to constraints imposed by cosmology and direct collider searches. DOI: 10.1103/PhysRevLett.109.251302

• 出版日期2012-12-20