Status of 3+1 neutrino mixing

Journal Article · Tue Nov 01 04:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.093006· OSTI ID:21608005

Giunti, Carlo; Laveder, Marco ^[1]

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1. INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino (Italy)

We present an update of our analysis of short-baseline neutrino oscillation data in the framework of 3+1 neutrino mixing taking into account the recent update of MiniBooNE antineutrino data and the recent results of the MINOS search for {nu}{sub {mu}} disappearance into sterile neutrinos (the more complicated 3+2 neutrino mixing is not needed since the CP-violating difference between MiniBooNE neutrino and antineutrino data has diminished). The results of our fits of short-baseline neutrino oscillation data including the MiniBooNE low-energy anomaly (now present both in the neutrino and antineutrino data) lead to a strong tension between appearance and disappearance data. Hence, it seems likely that the low-energy anomaly is not due to transitions. Excluding the MiniBooNE low-energy anomaly, appearance and disappearance data are marginally compatible. The global analysis has the best-fit point at {Delta}m{sub 41}{sup 2}{approx_equal}5.6 eV{sup 2}, which is rather large in comparison with cosmological bounds, but there are three regions within 1{sigma} at {Delta}m{sub 41}{sup 2}{approx_equal}1.6, 1.2, 0.91 eV{sup 2}. We also show that the data on the Gallium neutrino anomaly favor values of {Delta}m{sub 41}{sup 2} larger than about 1 eV{sup 2}.

• OSTI ID: 21608005
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 84; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTINEUTRINOS
ANTIPARTICLES
COMPARATIVE EVALUATIONS
CP INVARIANCE
ELEMENTARY PARTICLES
EVALUATION
FERMIONS
GLOBAL ANALYSIS
INVARIANCE PRINCIPLES
LEPTONS
MASSLESS PARTICLES
MATHEMATICS
MATTER
MUON NEUTRINOS
NEUTRINO OSCILLATION
NEUTRINOS