Angular momentum non-conserving decays in isotropic media

Details Angular momentum non-conserving decays in isotropic media Angular momentum non-conserving decays in isotropic media

2009-07-17

arxiv.org/abs/0907.3000v1

Eur.Phys.J.C63:331-342,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, Latex, uses axodraw.sty. 3 figures embedded in the tex file. This paper contains the same material as that presented

Scientific paper

10.1140/epjc/s10052-009-1107-y

Various processes that are forbidden in the vacuum due to angular momentum conservation can occur in a medium that is isotropic and does not carry any angular momentum. We illustrate this by considering explicitly two examples. The first one is the decay of a spin-0 particle into a photon and another spin-0 particle, using a model involving the Yukawa interactions of the scalar particles with a charged fermion field. The second one involves the decay of a neutrino into another neutrino and a graviton, in the standard model of particle interactions augmented with the linearized gravitational couplings.

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