Light Dark Matter and 4.5-sigma Solar B8 Neutrino Searches Result From the LUX-ZEPLIN (LZ) Experiment

by Dr Wenbo Ma（马文博） (University of Oxford)

Thursday 11 Dec 2025, 14:00 → 15:00 Asia/Shanghai

Tsung-Dao Lee Institute/N6F-N600 - Lecture Room (Tsung-Dao Lee Institute)

Abstract: 

LUX-ZEPLIN (LZ) is the world's largest liquid xenon dark matter experiment operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. In this talk, we present the most stringent search result for 5-9 GeV/c2 light dark matter in the presence of coherent elastic neutrino-nucleus scattering (CEvNS) from solar 8B neutrinos with the LUX-ZEPLIN experiment. The analysis uses 5.7 tonne-year exposure with data collected from March 2023 to April 2025. In the non-dark matter scenario, the result is consistent with 8B CEvNS events, corresponding to a 4.5-sigma statistical significance. This result was released on December 8, 2025, with the webinar broadcast at the Sanford Underground Research Facility.

Biography: 

Wenbo Ma is the postdoctoral researcher at the University of Oxford. He obtained the PhD degree from Shanghai Jiao Tong University in 2024. During his PhD he contributed to the first solar B8 neutrino search result for the PandaX-4T experiment. He joined the LUX-ZEPLIN and XLZD collaboration in 2025, with the major focus on solar B8 neutrino, light dark matter search, and future field cage design. He is the coordinator of the Oxford low-threshold search group, and the Oxford postdoc liaison committee particle physics subdepartment representative.

Online Meeting Room:https://meeting.tencent.com/dm/2ZjMba2mlXzw

ID:380177165