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SN 1987A and the status of oscillations solutions to the solar neutrino problem

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SN 1987A and the status of oscillations solutions to the solar neutrino problem

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dc.contributor.author Kachelriess, Michael
dc.contributor.author Strumia, Alessandro
dc.contributor.author Tomàs, Ricard
dc.contributor.author Furtado Valle, José Wagner
dc.date.accessioned 2015-10-22T10:21:51Z
dc.date.available 2015-10-22T10:21:51Z
dc.date.issued 2002
dc.identifier.citation Kachelriess, Michael Strumia, Alessandro Tomàs, Ricard Furtado Valle, José Wagner 2002 SN 1987A and the status of oscillations solutions to the solar neutrino problem Physical Review D 65 7 073016
dc.identifier.uri http://hdl.handle.net/10550/47845
dc.description.abstract We study neutrino oscillations and the level-crossing probability PLZ in power-law potential profiles A(r)\propto r^n. We give local and global adiabaticity conditions valid for all mixing angles theta and discuss different representations for PLZ. For the 1/r^3 profile typical of supernova envelopes we compare our analytical to numerical results and to earlier approximations used in the literature. We then perform a combined likelihood analysis of the observed SN1987A neutrino signal and of the latest solar neutrino data, including the recent SNO CC measurement. We find that, unless all relevant supernova parameters (released binding energy, \bar\nu_e and \bar\nu_{\mu,\tau} temperatures) are near their lowest values found in simulations, the status of large mixing type solutions deteriorates considerably compared to fits using only solar data. This is sufficient to rule out the vacuum-type solutions for most reasonable choices of astrophysics parameters. The LOW solution may still be acceptable, but becomes worse than the SMA-MSW solution which may, in some cases, be the best combined solution. On the other hand the LMA-MSW solution can easily survive as the best overall solution, although its size is generally reduced when compared to fits to the solar data only.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2002, vol. 65, num. 7, p. 073016
dc.subject Física
dc.title SN 1987A and the status of oscillations solutions to the solar neutrino problem
dc.type journal article es_ES
dc.date.updated 2015-10-22T10:21:52Z
dc.identifier.doi 10.1103/PhysRevD.65.073016
dc.identifier.idgrec 031780
dc.rights.accessRights open access es_ES

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