The excess of highest energy solar-neutrino events recently observed by Superkamiokande can be in principle explained by anomalously high hep-neutrino flux Φv(hep). Without using SSM calculations, from the solar luminosity constraint we derive that Φv(hep)/S13 cannot exceed the SSM estimate by more than a factor three. If one makes the additional hypothesis that hep neutrino production occurs where the 3He concentration is at equilibrium, helioseismology gives an upper bound which is (less then) two times the SSM prediction. We argue that the anomalous hep-neutrino flux of order of that observed by Superkamiokande cannot be explained by astrophysics, but rather by a large production cross-section. © 1998 Elsevier Science B.V. All rights reserved.
Bounds on hep neutrinos
FIORENTINI, Giovanni;RICCI, Barbara
1998
Abstract
The excess of highest energy solar-neutrino events recently observed by Superkamiokande can be in principle explained by anomalously high hep-neutrino flux Φv(hep). Without using SSM calculations, from the solar luminosity constraint we derive that Φv(hep)/S13 cannot exceed the SSM estimate by more than a factor three. If one makes the additional hypothesis that hep neutrino production occurs where the 3He concentration is at equilibrium, helioseismology gives an upper bound which is (less then) two times the SSM prediction. We argue that the anomalous hep-neutrino flux of order of that observed by Superkamiokande cannot be explained by astrophysics, but rather by a large production cross-section. © 1998 Elsevier Science B.V. All rights reserved.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
