Hawking radiation, chirality, and the principle of effective theory of
  gravity
  In this paper we combine the chirality of field theories in near horizon
regions with the principle of effective theory of gravity to define a new
energy-momentum tensor for the theory. This new energy-momentum tensor has the
correct radiation flux to account for Hawking radiation for space-times with
horizons. This method is connected to the chiral anomaly cancellation method,
but it works for space-times for which the chiral anomaly cancellation method
fails. In particular the method presented here works for the non-asymptotically
flat de Sitter space-time and its associated Hawking-Gibbons radiation, as well
as Rindler space-time and its associated Unruh radiation. This indicates that
it is the chiral nature of the field theory in the near horizon regions which
is of primary importance rather than the chiral anomaly.
