We calculate the combined angular-distribution functions of the polarized photons (γ1 and γ2) and electron (e-) produced in the cascade process pp → 3D3 → 3p2+γ1 → (ψ+γ2)+γ1 → (e++e-)+γ1+γ2, when the colliding p̄ and p are unpolarized. Our results are independent of any dynamical models and are expressed in terms of the spherical harmonics whose coefficients are functions of the angular-momentum helicity amplitudes of the individual processes. Once the joint angular distribution of (γ1γ2) and that of (γ2,e-) with the polarization of either one of the two particles are measured, our results will enable one to determine the relative magnitudes as well as the relative phases of all the angular-momentum helicity amplitudes in the radiative decay processes 3D3 → 3P2 + γ1 and 3p2 → ψ + γ2.
|Number of pages||13|
|Journal||European Physical Journal C|
|Publication status||Published - Feb 2014|
Scopus Subject Areas
- Engineering (miscellaneous)
- Physics and Astronomy (miscellaneous)