Angular distributions in the decays of the triplet D 2 state of charmonium directly produced in polarized proton-antiproton collisions

Alex W K MOK, K. J. Sebastian

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
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Abstract

Using the helicity formalism, we calculate the combined angular distribution function of the two gamma photons and the electron in the cascade process p̄p → 3 D 2→χ J1 and χ J →ψ+γ 2 → (e+ + -) + γ1 + γ2 (J=0,1,2), when p̄ and p are arbitrarily polarized. We also present the partially integrated angular distribution functions in six different cases. Our results show that by measuring the two-particle angular distribution of γ 1 and γ 2 and that of γ 1 and e -, one can determine the relative magnitudes as well as the relative phases of all the helicity amplitudes in the two radiative decay processes 3 D 2→χ J1 and χ J →ψ+γ 2.

Original languageEnglish
Pages (from-to)101-114
Number of pages14
JournalEuropean Physical Journal C
Volume63
Issue number1
DOIs
Publication statusPublished - Sep 2009

Scopus Subject Areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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