Angular distribution functions in the decays of the 3D 3 state of charmonium originating from unpolarized p̄p collisions

Alex W K MOK*, Cheuk Ping Wong, Wai Yu Sit

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Using the helicity formalism,we calculate the combined angular distribution function of the two photons (γ1 and γ2) and electron (e -) in the cascade process p̄p → 3D33P2 + γ1 → (χ + γ2)+ γ1 → (e++e-)+ γ2+ γ1, when p̄ and p are unpolarized. We also derive six different partially integrated angular distribution functions which give the angular distributions of one or two particles in the final state. Once the angular distributions are measured, our expressions will enable one to determine the relative magnitudes as well as the cosines of the relative phases of all the angular-momentum helicity amplitudes in the radiative decay processes 3D33P2 + γ1 and 3P2 → χ + γ2.

Original languageEnglish
Article number83
JournalJournal of High Energy Physics
Volume2012
Issue number10
DOIs
Publication statusPublished - 2012

Scopus Subject Areas

  • Nuclear and High Energy Physics

User-Defined Keywords

  • Electromagnetic processes and properties
  • Heavy quark physics

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