Speaker
保彪 岳
(Sun Yat-Sen University)
Description
Neutrino magnetic moment ($\nu$MM) is an important property of massive neutrinos.
The recent anomalous excess at few keV electronic recoils observed by the XENON1T collaboration might indicate a $\sim 2.2\times10^{-11}\mu_B$ effective neutrino magnetic moment ($\mu_\nu^{eff}$) from solar neutrinos.
Therefore, it is essential to carry out the $\nu$MM searches at a different experiment to confirm or exclude such a hypothesis.
We study the feasibility of doing $\nu$MM measurement with 4 kton active mass at Jinping neutrino experiment (Jinping) using electron recoil data from both natural and artificial neutrino sources.
The sensitivity of $\mu_\nu^{eff}$ can reach $<1.2\times10^{-11}\mu_B$ at 90\% C.L. with 10-year data taking of solar neutrinos.
Besides the abundance of the intrinsic low energy background $^{14}$C and $^{85}$Kr in the liquid scintillator, we find the sensitivity to $\nu$MM is highly correlated with the systematic uncertainties of $pp$ and $^{85}$Kr.
Reducing systematic uncertainties ($pp$ and $^{85}$Kr) and the intrinsic background ($^{14}$C and $^{85}$Kr)
can help to improve sensitivities below these levels and reach the region of astrophysical interest.
With a 3 mega-Curie (MCi) artificial neutrino source $^{51}$Cr installed at Jinping neutrino detector for 55 days,
it could give us a sensitivity to the electron neutrino magnetic moment ($\mu_{\nu_e}$) with $<1.1\times10^{-11}\mu_B$ at 90\% C.L..
With the combination of those two measurements, the flavor structure of the neutrino magnetic moment can be also probed at Jinping.
| Presentation type | Oral |
|---|
Primary author
保彪 岳
(Sun Yat-Sen University)
Co-authors
Jiajie Ling
(Sun Yat-sen University (中山大学))
Jiajun Liao
(Sun Yat-Sen University)
