Nuclear and Particle Physics Colloquium 140

(核与粒子物理学术报告会140)

Place: Shahe Campus C826

Time：2025年4月11日14:00

Title:First observation of reactor antineutrinos by coherent scattering with CONUS+

Speaker: 倪恺翔，德国马普所

Abstract:

Neutrinos are elementary particles that interact very weakly with matter. Detectors with tons or kilo-tons of masses are built to explore its nature. On the other hand, when entering sub-keV energy region, the channel of Coherent Elastic Neutrino-Nucleus Scattering (CEνNS) is enhanced significantly. This enables the detection of neutrinos with only several kg of target material, opening new paths to the (Beyond) Standard Model physics associated.

The CONUS+ experiment aims to measure CEνNS from nuclear reactor with germanium detectors. A threshold as low as 160 eV was achieved in the latest Run-1 operation. Over the 119 days of reactor on period, 395±106 neutrinos were observed, consistent with the Standard Model prediction. In this talk, I will discuss the experimental setup and the data analysis procedures, along with the Run-2 upgrade and its prospects.

About speaker:

Kaixiang Ni got his Ph.D. degree in Physics from Shanghai Jiao Tong University in 2022. Then he worked as a post-doctor in Max-Planck-Institute in Heidelberg, contributing significantly to the CONUS+ experiment. He is interested in experimental particle physics especially on the dark matter and neutrinos.