Search for semiclassicalgravity effects in relativistic stars.pdf

IFT-P.044/99 gr-qc/9905096 Search for semiclassical–gravity effects in relativistic stars Daniel A.T. Vanzella∗ and George E.A. Matsas† Instituto de F´ısica Te´orica, Universidade Estadual Paulista, Rua Pamplona 145, 01405-900, S˜ao Paulo, SP 9 9 Brazil 9 1 y a M Abstract 5 2 1 v We discuss the possible influence of gravity in the neutronization process, 6 9 p+ e− → n ν , which is particularly important as a cooling mechanism of 0 e 5 0 neutron stars. Our approach is semiclassical in the sense that leptonic fields 9 9 are quantized on a classical background spacetime, while neutrons and protons / c are treated as excited and unexcited nucleon states, respectively. We expect q - r gravity to have some influence wherever the energy content carried by the g : v in–state is barely above the neutron mass. In this case the emitted neutrinos i X would be soft enough to have a wavelength of the same order as the space r a curvature radius. 04.62.+v, 04.40.Dg Typeset using REVT X E ∗vanzella@ift.unesp.br †matsas@ift.unesp.br 1 The inner structure of neutron stars has attracted much attention of relativists and parti- cle and nuclear