Search for bosonic super-weakly interacting massive particles at COSINE-100

We present results of a search for bosonic super-weakly interacting massive particles (BSW) as keV scale dark matter candidates that is based on an exposure of 97.7 kg & BULL; year from the COSINE experiment. In this search, we employ, for the first time, Compton-like as well as absorption processes for pseudoscalar and vector BSWs. No evidence for BSWs is found in the mass range from 10 keV/c2 to 1 MeV/c2, and we present the exclusion limits on the dimensionless coupling constants to electrons gae for pseudoscalar and & kappa; for vector BSWs at 90% confidence level. Our results show that these limits are improved by including the Compton-like process in masses of BSW, above O(100 keV/c2).

Automated summary

We present the results of a search for bosonic super-weakly interacting massive particles (BSW) as keV scale dark matter candidates based on the COSINE experiment. For the first time, Compton-like and absorption processes were employed to study pseudoscalar and vector BSWs. No evidence of BSWs was found in the mass range from 10 keV/c2 to 1 MeV/c2, and exclusion limits on the dimensionless coupling constants to electrons gae for pseudoscalar and κ for vector BSWs at a 90% confidence level are presented. Our findings show the improved limits with the incorporation of the Compton-like process for BSW masses above O(100 keV/c2).