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Influence of CP and CPT on production and decay of Dirac and Majorana fermions

  • G. Moortgat-Pick
  • H. Fraas
Theoretical Physics

Abstract.

The consequences of CP and CPT invariance for production and subsequent decay of Dirac and Majorana fermions in polarized fermion-antifermion annihilation are analytically studied. We derive general symmetry relations for the production spin density matrix and for the three-particle decay matrices and obtain constraints for the polarization and the spin-spin correlations of Dirac and Majorana fermions. We prove that only for Majorana fermions the energy and opening angle distribution factorizes exactly into contributions from production and decay if CP is conserved.

Keywords

Density Matrix Spin Density Angle Distribution General Symmetry Symmetry Relation 
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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2002

Authors and Affiliations

  • G. Moortgat-Pick
    • 1
  • H. Fraas
    • 2
  1. 1.DESY, Deutsches Elektronen-Synchrotron, 22603 Hamburg, Germany DE
  2. 2. Institut für Theoretische Physik und Astrophysik, Universität Würzburg, 97074 Würzburg, Germany DE

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