Statistical analysis of neutrino events from SN1987A neutrino burst: estimation of the electron antineutrino mass
| dc.creator | Goryachev, B. I. | |
| dc.date | 2007-09-28 | |
| dc.date.accessioned | 2026-07-07T08:32:54Z | |
| dc.date.available | 2026-07-07T08:32:54Z | |
| dc.description | The method of the statistical sample moments was used for the analysis of neutrino events from SN1987A burst in Cherenkov detectors. In particular the coefficients of correlation $Q(E,t)$ between the energies $E$ of electron antineutrinos $\bar ν_e$ emitted by star and the ejection instants $t$ of $\bar ν_e$ for neutrino events recorded by Cherenkov water detectors of KII and IMB collaborations were calculated. $Q(E,t)$ values depend on the assumed mass of $\bar ν_e$. Modern model of the gravitational stellar core collapse with an accretion phase predicts the low level of such correlation $<Q(E,t)>$ averaged with respect to neutrino burst. On condition that empirical $Q(E,t)$ values equal the theoretical model quantities $<Q(E,t)>$ one can obtain $22\pm10 eV/c^{2}$ as an estimate of the nonzero $\bar ν_e$ mass. The error of this estimate implies that $\bar ν_e$ mass less than $2 eV/c^2$ is unlikely. The laboratry data of the tritium $β$-decay agree adequately with the presented astrophysical estimate provided that the anomalous structure near the end point of $β$-spectrum is taken into account. | |
| dc.description | 12 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0709.4627 | |
| dc.identifier | http://arxiv.org/abs/0709.4627 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/138947 | |
| dc.subject | Astrophysics | |
| dc.title | Statistical analysis of neutrino events from SN1987A neutrino burst: estimation of the electron antineutrino mass | |
| dc.type | text |