Addendum to Finite-size effects on multibody neutrino exchange

Details Addendum to Finite-size effects on multibody neutrino exchange Addendum to Finite-size effects on multibody neutrino exchange

1998-10-22

arxiv.org/abs/hep-ph/9810449v2

Phys.Rev. D59 (1999) 077302

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex file (Revtex), 9 pages, 1 figure, one reference changed

Scientific paper

10.1103/PhysRevD.59.077302

The interaction energy of the neutrons due to massless neutrino exchange in a neutron star has recently been proved, using an effective theory, to be extremely small and infrared-safe. Our comment here is of conceptual order: two approaches to compute the total interaction energy density have recently been proposed. Here, we study the connection between these two approaches. From CP invariance, we argue that the resulting interaction energy has to be even in the parameter $b=-G_F n_n /\sqrt{2}$, which expresses the static neutrino potential created by a neutron medium of density $n_n$.

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