Interpreting the LSND anomaly: Sterile neutrinos or CPT violation or...? - INSPIRE

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Interpreting the LSND anomaly: Sterile neutrinos or CPT violation or...?

Alessandro Strumia
(
- CERN
)

Jan, 2002

8 pages

Published in:

Phys.Lett.B 539 (2002) 91-101

e-Print:

hep-ph/0201134 [hep-ph]

DOI:

10.1016/S0370-2693(02)02042-7

Report number:

IFUP-TH-2002-3,
CERN-TH-2002-3

View in:

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Abstract: (Elsevier)

We first study how sterile neutrinos can fit the 5 σ ν ̄ μ → ν ̄ e LSND anomaly: 2+2 solutions are strongly disfavoured by solar and atmospheric data, while 3+1 solutions can still give a poor fit (for a specific range of oscillation parameters, to be tested by MiniBooNE). If MiniBooNE will see no ν μ → ν e transitions, we will have a hint for CPT violation. Already now, unlike sterile neutrinos, CPT-violating neutrino masses can accommodate all safe and unsafe data. We study how much CPT must be conserved according to atmospheric and K2K data and list which CPT-violating signals could be discovered by forthcoming solar and long-baseline experiments.

Note:

12 pages. Version 2: update about SNO. Version 3: addendum about KamLAND. Version 4: addendum at pages 11,12 discussing how much the recent WMAP data disfavour the 3+1 sterile solution

neutrino: sterile
antineutrino: oscillation
antineutrino/e
antineutrino/mu
violation: CPT
neutrino: mass
neutrino: cosmic radiation
numerical calculations: interpretation of experiments

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Figures(0)

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