## Abstract

Using the helicity formalism, we calculate the combined angular distribution function of the two gamma photons ((Formula presented.)(Formula presented.) and (Formula presented.)(Formula presented.)) and the electron ((Formula presented.)e(Formula presented.)-(Formula presented.)) in the triple cascade process (Formula presented.)(Formula presented.), when (Formula presented.)(Formula presented.) and (Formula presented.)(Formula presented.)are arbitrarily polarized. We also derive six different partially integrated angular distribution functions which give the angular distributions of one or two particles in the final state. Our results show that by measuring the two-particle angular distribution of (Formula presented.)(Formula presented.) and (Formula presented.)(Formula presented.)and that of (Formula presented.)(Formula presented.) and(Formula presented.)(Formula presented.), one can determine the relative magnitudes as well as the relative phases of all the helicity amplitudes in the two charmonium radiative transitions (Formula presented.)(Formula presented.) and (Formula presented.)(Formula presented.).

Original language | English |
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Article number | 109 |

Pages (from-to) | 1-14 |

Number of pages | 14 |

Journal | European Physical Journal C |

Volume | 75 |

Issue number | 3 |

DOIs | |

Publication status | Published - 2015 |

## Scopus Subject Areas

- Engineering (miscellaneous)
- Physics and Astronomy (miscellaneous)