  At the high densities present in the interior of neutron stars, the neutrons
are condensed into the 3P2 superfluid phase. While this condensation has little
impact on the equation of state, it can have an important role in determining
the low-temperature energy-momentum transport properties. The spontaneous
breaking of baryon number by the condensate gives rise to the familiar
Goldstone boson, but in addition, the spontaneous breaking of rotational
invariance by the condensate gives rise to three Goldstone bosons, in general,
one for each broken generator of rotations. These Goldstone bosons, which
couple to the Z0, provide a new mechanism for neutrino emission. Using a
low-energy effective field theory to describe the dynamics of these Goldstone
bosons we estimate the neutrino emissivity of dense neutron matter and show
that their annihilation is the dominant energy-loss mechanism over a range of
temperatures.
