A Reanalysis of the LSND Neutrino Oscillation Experiment

Abstract

We reanalyse the LSND neutrino oscillation results in the framework of the Projected Quasiparticle Random Phase Approximation (PQRPA), which is the only RPA model that treats the Pauli Principle correctly, and accounts satisfactorily for great majority of the weak decay observables around 12C. We have found that the employment of the PQRPA inclusive DIF 12C(nu_e,e-)12N cross-section, instead of the CRPA used by the LSND collaboration in the (nu_mu ->nu_e) oscillations study of the 1993-1995 data sample, leads to the following: 1) the oscillation probability is increased from (0.26 +/- 0.10 +/- 0.05) percents to (0.33 +/- 0.10 +/- 0.13) percents, and 2) the previously found consistence between the (sin^2 2theta, Delta m^2) confidence level regions for the (nu_mu -> nu_e) and the (bar{nu}_mu -> bar{nu}_e) oscillations is significantly diminished. These effects are not due to the difference in the uncertainty ranges for the neutrino-nucleus cross-section, but to the difference in the cross-sections themselves.

arXiv commentREVTEX4, 14 pages, 3 figures, accepted for publication in Phys. Lett. B

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Cited by in corpus (5)

• Inclusive charged-current neutrino-nucleus reactions calculated with the relativistic quasiparticle random phase approximation
• Neutrino and antineutrino charge-exchange reactions on 12C
• Detection of supernovae neutrinos with neutrino-iron scattering
• QRAP: a numerical code for projected (Q)uasi-particle (RA)ndom (P)hase approximation
• Invisible Z decay width bounds on active-sterile neutrino mixing in the (3+1) and (3+2) models