Ponente
Prof.
Alexander Studenikin
(Moscow State University and JINR-Dubna)
Descripción
A possibility for a neutrino to be an electrically millicharged particle is one of the presently discussed manifestation of physics beyond the Standard Model. Using the new limit on the neutrino anomalous magnetic moment recently obtained by the GEMMA experiment on measurements of the cross section for the reactor antineutrino scattering on free electrons, we get a new direct upper bound on the neutrino millicharge $\mid q_{\nu} \mid < 1.5 \times 10^{-12} e_0$. This is a factor of 2 more stringent than the reactor neutrino scattering constraint obtained the TEXONO reactor experiment data and included by the Particle Data Group Collaboration to the Review of Particle Physics 2012. We predict that with data from the ongoing new phase of the GEMMA experiment the upper bound on the neutrino millicharge will be reduced to $\mid q_{\nu} \mid < 3.7 \times 10^{-13}e_0$ within two years. We also predict that with the next phase of the considered experiment the upper bound on the millicharge will be reduced by an order of magnitude over the present bound and reach the level $\mid q_{\nu} \mid < 1.8 \times 10^{-13}e_0$ within approximately four years. Accordingly, a new bound on the millicharge that will be obtained within a few years with next release of the GEMMA experiment data will be a factor of 10 more stringent than one from the present GEMMA data.
Autor primario
Prof.
Alexander Studenikin
(Moscow State University and JINR-Dubna)
