Identification of DM, neutrino and new neutrino interaction statistically in DM direct detection experiments.

by Mr Bing-Long Zhang (Sun Yat-sen University)

Wednesday 7 Jun 2023, 14:30 → 17:00 Asia/Shanghai

Tsung-Dao Lee Institute/N6F-N630 - Smart Classroom (Tsung-Dao Lee Institute)

Abstract:

Since DM direct detection enter a multi-ton scale era, DM detectors possess sensitivities to CEvNS events from solar neutrinos, i.e., reach the neutrino floor. We will review the recently redefined neutrino floor and fog, which is independent of the detector threshold and exposure. We also provide an analysis on the statistical methodology behind the neutrino fog, from which we derive two methods to accelerate the computation on the neutrino floor. Furthermore, we will demonstrate whether some potential excess signals come from DM or the neutrino new interaction, which has not been discussed extensively before. Our new development on asymptotic analysis on the binned likelihood is also applicable in this context. Moreover, in addition to the DM-nucleon interaction, we also investigate the DM-electron interaction with the ionization signal in Xenon-based detector.

Biography:

Bing-Long Zhang has received his B.S. degree in physics from Sun Yat-Sen University and now is a PH.D. candidate supervised by Prof. Jian Tang inSun Yat-Sen University . His research focuses on particle phenomenology including neutrino and dark matter.

20230607 BL Zhang DM+nu.pdf