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Angular momentum non-conserving decays in isotropic media

  • Regular Article - Theoretical Physics
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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.

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Authors and Affiliations

  1. Laboratory of Theoretical Physics, Department of Physics, University of Puerto Rico, P.O. Box 23343, Río Piedras, 00931-3343, Puerto Rico

    José F. Nieves

  2. Saha Institute of Nuclear Physics, 1/AF Bidhan-Nagar, Calcutta, 700064, India

    Palash B. Pal

Authors
  1. José F. Nieves
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  2. Palash B. Pal
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Correspondence to Palash B. Pal.

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Nieves, J.F., Pal, P.B. Angular momentum non-conserving decays in isotropic media. Eur. Phys. J. C 63, 331–342 (2009). https://doi.org/10.1140/epjc/s10052-009-1107-y

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  • DOI: https://doi.org/10.1140/epjc/s10052-009-1107-y

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