Status of 3+1 Neutrino Mixing
  We present an update of our analysis of short-baseline neutrino oscillation
data in the framework of 3+1 neutrino mixing taking into account the recent
update of MiniBooNE antineutrino data and the recent results of the MINOS
search for nu_mu disappearance into sterile neutrinos (the more complicated 3+2
neutrino mixing is not needed since the CP-violating difference between
MiniBooNE neutrino and antineutrino data has diminished). The results of our
fits of short-baseline neutrino oscillation data including the MiniBooNE
low-energy anomaly (now present both in the neutrino and antineutrino data)
leads to a strong tension between appearance and disappearance data. Hence, it
seems likely that the low-energy anomaly is not due to nu_mu -> nu_e
transitions. Excluding the MiniBooNE low-energy anomaly, appearance and
disappearance data are marginally compatible. The global analysis has the
best-fit point at Delta m^2_{41} about 5.6 eV^2, which is rather large in
comparison with cosmological bounds, but there are three regions within 1 sigma
at Delta m^2_{41} about 1.6, 1.2, 0.91 eV^2. We also show that the data on the
Gallium neutrino anomaly favor values of Delta m^2_{41} larger than about 1
eV^2.
