COMPARING AND CONTRASTING THE NU(MU)-]NU(TAU) AND NU(MU)-]NU(S) SOLUTIONS TO THE ATMOSPHERIC NEUTRINO PROBLEM WITH SUPERKAMIOKANDE DATA - ART. NO. 013006
R. Foot et al., COMPARING AND CONTRASTING THE NU(MU)-]NU(TAU) AND NU(MU)-]NU(S) SOLUTIONS TO THE ATMOSPHERIC NEUTRINO PROBLEM WITH SUPERKAMIOKANDE DATA - ART. NO. 013006, Physical review. D. Particles and fields, 5801(1), 1998, pp. 3006
The nu(mu) --> nu(tau) and nu(mu) --> nu(s) solutions to the atmospher
ic neutrino problem are compared with SuperKamiokande data. The differ
ences between these solutions due to matter effects in the Earth are c
alculated for the ratio of mu-like to e-like events and for up-down fl
ux asymmetries. These quantities are chosen because they are relativel
y insensitive to theoretical uncertainties in the overall neutrino flu
x normalization and detection cross sections and efficiencies. A chi(2
) analysis using these quantities is performed yielding 3 sigma ranges
which are approximately given by (0.725 - 1.0, 4 X 10(-4) - 2 X 10(-2
) eV(2)) and (0.74 - 1.0, 1 X 10(-3) - 2 X 10(-2) eV(2)) for (sin(2)2
theta, Delta m(2)) for the nu(mu) --> nu(tau) and nu(mu) --> nu(s) sol
utions, respectively. Values of Delta m(2) smaller than about 2 X 10(-
3) eV(2) are disfavored for the nu(mu) --> nu(s) solution, suggesting
that future long baseline experiments should see a positive signal if
this scenario is the correct one. [S0556-2821(98)00913-8].