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The European Physical Journal C

, Volume 63, Issue 2, pp 331–342 | Cite as

Angular momentum non-conserving decays in isotropic media

Regular Article - Theoretical Physics
  • 34 Downloads

Abstract

Various processes that are forbidden in 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.

Keywords

Form Factor Vertex Function Gravitational Coupling Charged Fermion Massless Limit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2009

Authors and Affiliations

  1. 1.Laboratory of Theoretical Physics, Department of PhysicsUniversity of Puerto RicoRío PiedrasPuerto Rico
  2. 2.Saha Institute of Nuclear PhysicsCalcuttaIndia

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