Are there sterile neutrinos at the eV scale?
  New predictions for the anti-neutrino flux emitted by nuclear reactors
suggest that reactor experiments may have measured a deficit in the
anti-neutrino flux, which can be interpreted in terms of oscillations between
the known active neutrinos and new sterile states. Motivated by this
observation, we perform a re-analysis of global short-baseline neutrino
oscillation data in a framework with one or two sterile neutrinos. While one
sterile neutrino is still not sufficient to reconcile the signals suggested by
reactor experiments and by the LSND and MiniBooNE experiments with null results
from other searches, we find that, with the new reactor flux prediction, the
global fit improves considerably when the existence of two sterile neutrinos is
assumed.
