A reanalysis of the LSND neutrino oscillation experiment

摘要

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 C-12. We have found that the employment of the PQRPA inclusive DIF C-12(v(e), e(-))N-12 cross-section, instead of the CRPA used by the LSND Collaboration in the v(mu) -> v(e) oscillations study of the 1993-1995 data sample, leads to the following: (1) the oscillation probability is increased from (0.26 +/- 0.10 +/- 10.05) to (0.33 +/- 0.10 +/- 0.13), and (2) the previously found consistence between the (sin(2) 2 theta, Delta m(2)) confidence level regions for the v(mu) -> v(e) and the (v) over bar (mu) -> (v) over bar (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. (c) 2006 Elsevier B.V. All rights reserved.