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EnglishWe propose to exploit the angular distribution of the positrons emitted in the reaction <(nu)over bar>(e) + p --> n + e(+) to extract a possible antineutrino signal from the Superkamiokande background. From the statistics collected in just 101.9 days one obtains a model independent upper bound on the antineutrino flux Phi(nu)- (E(nu)-> 8.3 MeV) < 9 . 10(4) cm(-2) s(-1) at the 95% C.L. By assuming the same energy spectrum as for the (8)B neutrinos, the 95% C.L. bound is Phi(nu)- (E(nu)-> 8.3 MeV) < 6 . 10(4) cm(-2) s(-1). Within three years of data taking, the sensitivity to nu(e) --> <(nu)over bar>(e) transition probability will reach the 1% level, thus providing a stringent test of hybrid oscillation models. (C) 1997 Elsevier Science B.V.
http://hdl.handle.net/11697/8819| Titolo: | Superkamiokande and solar antineutrinos |
| Autori interni: | VILLANTE, FRANCESCO LORENZO |
| Data di pubblicazione: | 1997 |
| Rivista: | PHYSICS LETTERS. SECTION B |
| Abstract: | We propose to exploit the angular distribution of the positrons emitted in the reaction <(nu)over bar>(e) + p --> n + e(+) to extract a possible antineutrino signal from the Superkamiokande background. From the statistics collected in just 101.9 days one obtains a model independent upper bound on the antineutrino flux Phi(nu)- (E(nu)-> 8.3 MeV) < 9 . 10(4) cm(-2) s(-1) at the 95% C.L. By assuming the same energy spectrum as for the (8)B neutrinos, the 95% C.L. bound is Phi(nu)- (E(nu)-> 8.3 MeV) < 6 . 10(4) cm(-2) s(-1). Within three years of data taking, the sensitivity to nu(e) --> <(nu)over bar>(e) transition probability will reach the 1% level, thus providing a stringent test of hybrid oscillation models. (C) 1997 Elsevier Science B.V. |
| Handle: | http://hdl.handle.net/11697/8819 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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