Document Type

Journal Article

Department/ Unit

Department of Physics

Abstract

Using the helicity formalism, we calculate the combined angular distribution function of the two gamma photons and the electron in the cascade process pp → 3D2 → χJ+γ1 → (ψ+γ2)+γ1 → (e+ + e−)+γ1+γ2 (J=0,1,2), when p 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 3D2→χ J +γ 1 and χ J →ψ+γ 2. PACS 11.80.Cr - 13.20.Fc

Publication Year

2009

Journal Title

The European Physical Journal C - Particles and Fields

Volume number

63

Issue number

1

Publisher

Springer Verlag

First Page (page number)

101

Last Page (page number)

114

Referreed

1

DOI

10.1140/epjc/s10052-009-1091-2

ISSN (print)

1434-6052

Link to Publisher’s Edition

http://dx.doi.org/10.1140/epjc/s10052-009-1091-2

Included in

Physics Commons

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