The neutrino ground state in a neutron star

We address a recent claim that the stability of neutron stars implies a low er bound on the mass of the neutrino. We argue that the result obtained by some previous authors is due to an improper summation of an infrared-sensit ive series and that a non-perturbative "resummation" of the series yields a finite and well-behaved result. The stability of neutron stars thus gives no lower bound on the mass of the neutrino.