Angular distribution functions in the decays of [psi][prime] and [psi][prime][prime] directly produced in unpolarized [ital [bar p]p] collisions

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.51.1177· OSTI ID:6643556

Ridener, Jr, F L ^[1]; Sebastian, K J ^[2]

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1. Pennsylvania State University at New Kensington, New Kensington, Pennsylvania 15068 (United States)
2. Department of Physics, 1 University Avenue, University of Massachusett at Lowell, Lowell, Massachusetts 01854 (United States)

We calculate the combined angular distribution of the two photons and of the electron in the triple cascade process [ital [bar p]p][r arrow][psi][prime],[psi][prime][prime][r arrow][chi][sub [ital J]]+[gamma][sub 1][r arrow]([psi][gamma][sub 2]) +[gamma][sub 1][r arrow]([ital e][sup +][ital e][sup [minus]])+[gamma][sub 2]+[gamma][sub 1] ([ital J]=0,1,2) when [ital [bar p]] and [ital p] are unpolarized. The answer is given in the [psi][prime],[psi][prime][prime] restframe or the [ital [bar p]p] c.m. frame. By measuring this angular distribution one can determine the magnitudes as well as the relative phases of the angular momentum helicity amplitudes in the radiative decay processes [psi][prime],[psi][prime][prime][r arrow][chi][sub [ital J]]+[gamma][sub 1] and [chi][sub [ital J]][r arrow][psi]+[gamma][sub 2] ([ital J]=0,1,2) as well as the relative magnitudes of the angular momentum helicity amplitudes in the processes [ital [bar p]p][r arrow][psi][prime][psi][prime][prime] and [psi][r arrow][ital e][sup +][ital e][sup [minus]].

• OSTI ID: 6643556
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 51:3; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON-BARYON INTERACTIONS
BOSONS
CHARMONIUM
DECAY
DISTRIBUTION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
GAMMA CASCADES
HADRON-HADRON INTERACTIONS
HADRONS
HELICITY
INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MESONS
NUCLEAR CASCADES
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTONS
PROTON-ANTIPROTON INTERACTIONS
PSI-3685 MESONS
PSI-3770 MESONS
QUARKONIUM
RADIATIVE DECAY
VECTOR MESONS