Jul 22 – 27, 2018
MacMillian
US/Eastern timezone

Results on sub-GeV dark matter direct detection with LUX Run 3 data by using Bremsstrahlung and Migdal-effect signal

Jul 24, 2018, 3:20 PM
20m
117 (MacMillian)

117

MacMillian

Brown University Providence, Rhode Island, USA
Talk Direct Detection 2.3 Direct Detection

Speaker

Junsong Lin (Lawrence Berkeley National Laboratory)

Description

Dual-phase xenon time projection chambers have been recently suggested to be sensitive to sub-GeV dark matter if the inelastic channels of Bremsstrahlung and the Migdal effect in the nuclear interaction are taken into account. Sub-GeV dark matter is difficult to probe due to the small energy transfer in dark matter-nucleus elastic scattering and the finite energy threshold of the detector. Considering photon emissions from Bremsstrahlung or electron emissions from Migdal effect in the dark matter nucleus inelastic scattering could circumvent this difficulty. This analysis utilizes both the scintillation (S1) and ionization (S2) signals in the LUX Run 3 data. New sub-GeV parameter space in the dark matter- nucleus interaction cross-section is explored using the Profile Likelihood Ratio method.

Primary authors

Junsong Lin (Lawrence Berkeley National Laboratory) Lucie Tvrznikova (Yale/LBNL)

Presentation materials