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

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

2002-04-29

arxiv.org/abs/hep-ph/0204333v1

Eur.Phys.J.C25:189-197,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 3 eps figures, to be published in EPJ C

Scientific paper

10.1007/s10052-002-0979-x

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.

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