A reanalysis of the LSND neutrino oscillation experiment

A. SAMANA, F. KRMPOTIC, A. MARIANO, R. ZUKANOVICH FUNCHAL

PHYSICS LETTERS B

Elsevier

Año: 2006 vol. 642 p. 100 - 105

0370-2693

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(neutrino_e, e)12N cross-section, instead of the CRPA used by the LSND Collaboration in the neutrino_muon  --> neutrino_electron oscillations study of the 1993¨C1995 data sample, leads to the following: (1) the oscillation probability is increased from (0.26 +/- 0.10 +/- 0.05)% to (0.33+/-0.10+/-0.13)%, and (2) the previously found consistence between the (sin2 2theta,Delta m2) confidence level regions for the neutrino_muon  --> neutrino_electron and the anti-neutrino_muon  --> anti-neutrino_electron oscillations is significantly diminished. These effects are not due to the difference in the uncertainty ranges for the neutrino 12C nucleus cross-section, but to the difference in the cross-sections themselves.