Improving large mixing angle predictions with nonstandard interactions: Neutrino decay in solar matter?

Journal Article · Tue Mar 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.053009· OSTI ID:21578174

Das, C R; Pulido, Joao ^[1]

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1. Centro de Fisica Teorica de Particulas (CFTP), Departamento de Fisica, Instituto Superior Tecnico, Av. Rovisco Pais, P-1049-001 Lisboa (Portugal)

It has been known for some time that the well-established large mixing angle (LMA) solution to the observed solar neutrino deficit fails to predict a flat energy spectrum for Super-Kamiokande as opposed to what the data indicates. It also leads to a Chlorine rate which appears to be too high as compared to the data. We investigate the possible solution to these inconsistencies with nonstandard neutrino interactions, assuming that they come as extra contributions to the {nu}{sub {alpha}}{nu}{sub {beta}} and {nu}{sub {alpha}}e vertices that affect both the propagation of neutrinos in the Sun and their detection. We find that, among the many possibilities for nonstandard couplings, only the diagonal imaginary ones lead to a solution to the tension between the LMA predictions and the data, implying neutrino instability in the solar matter. Unitarity requirements further restrict the solution and a neutrino decay into an antineutrino and a Majoron within the Sun is the one favored. Antineutrino probability is however too small to open the possibility of experimentally observing antineutrinos from the Sun due to NSI.

• OSTI ID: 21578174
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevD.83.053009; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTINEUTRINOS
DETECTION
ENERGY SPECTRA
INSTABILITY
INTERACTIONS
LEAD
MATHEMATICAL SOLUTIONS
PARTICLE DECAY
PROBABILITY
SOLAR NEUTRINOS
SUN
UNITARITY
WEINBERG ANGLE
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
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ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
LEPTONS
MAIN SEQUENCE STARS
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MATTER
METALS
NEUTRINOS
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SOLAR PARTICLES
SOLAR RADIATION
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STELLAR RADIATION