Speaker
Description
We have searched for exotic neutrino-electron interactions that could be produced by a neutrino millicharge, magnetic moment or dark photons using solar neutrinos in the XMASS-I. No significant signals have been observed and upper limit of these constant values are estimated as preliminary. For the neutrino millicharge search, $5.4\times10^{-11}$e for all flavors of neutrino is obtained. We also set individual flavors to be $7.3\times10^{-12}e$ for $\nu_e$, $1.1\times10^{-11}e$ for $\nu_{\mu}$, and $1.1\times10^{-11}e$ for $\nu_{\tau}$. These limits ate the most stringent yet obtained from direct measurements. For the neutrino magnetic moment search, $1.8\times10^{-10}\mu_{B}$ is obtained. In addition, we obtain upper limits for the coupling constant of dark photons and almost exclude the possibility to understand the muon $g-2$ anomaly by dark photons.
Mini-abstract
XMASS-I experiment search for exotic neutrino-electron interactions in xenon using solar neutrinos.
| Experiment/Collaboration | XMASS collaboration |
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