First observation of reactor antineutrinos by coherent scattering with CONUS+

by Dr Kaixiang Ni (Max-Planck-Institute in Heidelberg)

Wednesday 5 Mar 2025, 10:00 → 12:00 Asia/Shanghai

5#/6th-603 - Meeting Room 603 (Science Building)

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 uses high-purity point-contact germanium detectors with a total mass of 4 kg, placed 20 meters from a nuclear reactor core. The latest Run-1 dataset achieved an extremely low threshold of 160 eV. Over the 119 days of reactor operation, 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.

 

Biography: 

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.

Host: Prof. Ke Han

Alternative online link: https://meeting.tencent.com/dm/5tNovpVocHeT (id: 435222221 passcode: 123456）