Unambiguously Resolving the Potential Neutrino Magnetic Moment Signal at Large Liquid Scintillator Detectors  

作　　者：Ziping Ye Feiyang Zhang Donglian Xu Jianglai Liu 叶子平;张飞洋;徐东莲;刘江来(Tsung-Dao Lee Institute,Shanghai 200240,China;INPAC and School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Laboratory for Particle Physics and Cosmology,Key Laboratory for Particle Physics and Cosmology(MOE),Shanghai 200240,China)

机构地区：[1]Tsung-Dao Lee Institute,Shanghai 200240,China [2]INPAC and School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China [3]Shanghai Laboratory for Particle Physics and Cosmology,Key Laboratory for Particle Physics and Cosmology(MOE),Shanghai 200240,China

出　　处：《Chinese Physics Letters》2021年第11期18-22,共5页中国物理快报（英文版）

基　　金：Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA10010800);the Double First Class Start-up Fund (WF220442603) provided by Shanghai Jiao Tong University;support from the CAS Center for Excellence in Particle Physics (CCEPP)。

摘　　要：Non-vanishing electromagnetic properties of neutrinos have been predicted by many theories beyond the Standard Model, and an enhanced neutrino magnetic moment can have profound implications for fundamental physics. The XENON1T experiment recently detected an excess of electron recoil events in the 1–7 keV energy range, which can be compatible with solar neutrino magnetic moment interaction at a most probable value of μ_(v) = 2.1 × 10^(-11)μ_(B).However, tritium backgrounds or solar axion interaction in this energy window are equally plausible causes.Upcoming multi-tonne noble liquid detectors will test these scenarios more in depth, but will continue to face similar ambiguity. We report a unique capability of future large liquid scintillator detectors to help resolve the potential neutrino magnetic moment scenario. With O(100) kton·year exposure of liquid scintillator to solar neutrinos, a sensitivity of μ_(v) < 10^(-11)μ_(B) can be reached at an energy threshold greater than 40 keV, where no tritium or solar axion events but only neutrino magnetic moment signal is still present.

关 键 词：Unambiguously Resolving the Potential Neutrino Magnetic Moment Signal at Large Liquid Scintillator Detectors 

分 类 号：O572.321[理学—粒子物理与原子核物理]