Cargando…

SN1987A and the Status of Oscillation Solutions to the Solar Neutrino Problem

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 envelope...

Descripción completa

Detalles Bibliográficos
Autores principales: Kachelriess, M, Strumia, A, Tomàs, R, Valle, J W F
Lenguaje:eng
Publicado: 2001
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.65.073016
http://cds.cern.ch/record/514093
_version_ 1780897583246344192
author Kachelriess, M
Strumia, A
Tomàs, R
Valle, J W F
author_facet Kachelriess, M
Strumia, A
Tomàs, R
Valle, J W F
author_sort Kachelriess, M
collection CERN
description 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.
id cern-514093
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2001
record_format invenio
spelling cern-5140932019-09-30T06:29:59Zdoi:10.1103/PhysRevD.65.073016http://cds.cern.ch/record/514093engKachelriess, MStrumia, ATomàs, RValle, J W FSN1987A and the Status of Oscillation Solutions to the Solar Neutrino ProblemParticle Physics - PhenomenologyWe 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.hep-ph/0108100CERN-TH-2001-219IFIC-2001-42IFUP-TH-2001-25oai:cds.cern.ch:5140932001-08-10
spellingShingle Particle Physics - Phenomenology
Kachelriess, M
Strumia, A
Tomàs, R
Valle, J W F
SN1987A and the Status of Oscillation Solutions to the Solar Neutrino Problem
title SN1987A and the Status of Oscillation Solutions to the Solar Neutrino Problem
title_full SN1987A and the Status of Oscillation Solutions to the Solar Neutrino Problem
title_fullStr SN1987A and the Status of Oscillation Solutions to the Solar Neutrino Problem
title_full_unstemmed SN1987A and the Status of Oscillation Solutions to the Solar Neutrino Problem
title_short SN1987A and the Status of Oscillation Solutions to the Solar Neutrino Problem
title_sort sn1987a and the status of oscillation solutions to the solar neutrino problem
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.65.073016
http://cds.cern.ch/record/514093
work_keys_str_mv AT kachelriessm sn1987aandthestatusofoscillationsolutionstothesolarneutrinoproblem
AT strumiaa sn1987aandthestatusofoscillationsolutionstothesolarneutrinoproblem
AT tomasr sn1987aandthestatusofoscillationsolutionstothesolarneutrinoproblem
AT vallejwf sn1987aandthestatusofoscillationsolutionstothesolarneutrinoproblem