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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

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.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.rights.uri	info:eu-repo/semantics/openAccess
dc.source	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.subject	Física
dc.title	SN 1987A and the status of oscillations solutions to the solar neutrino problem
dc.type	info:eu-repo/semantics/article
dc.date.updated	2015-10-22T10:21:52Z
dc.identifier.doi	http://dx.doi.org/10.1103/PhysRevD.65.073016
dc.identifier.idgrec	031780