Radiative angular distributions from charmonium states directly produced by p p annihilation

Journal Article · Fri May 01 04:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.3173· OSTI ID:7044190

Ridener, Jr, F L ^[1]; Sebastian, K J ^[2]; Grotch, H ^[3]

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1. Department of Physics, Penn State University-New Kensington Campus, New Kensington, Pennsylvania 15068 (United States)
2. Department of Physics, University of Lowell, Lowell, Massachusetts 01854 (United States)
3. Department of Physics, Penn State University, University Park, Pennsylvania 16802 (United States)

We calculate the combined angular distributions of the photon and the electron in the cascade process {ital p{bar p}}{r arrow}{chi}{sub {ital J}}{r arrow}{psi}{gamma}{r arrow}({ital e}{sup +}{ital e{minus}}){gamma} ({ital J}=2,1,0), in terms of the helicity or the multipole transition amplitudes in {chi}{sub {ital J}}{r arrow}{psi}{gamma}. Our expressions for them differ from those found previously. We describe the origin of these differences. The effect of the motion of {psi} in the {chi}{sub {ital J}} rest frame on the angular-distribution functions is taken into account.

• OSTI ID: 7044190
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 45:9; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
662390 -- Electromagnetic Processes & Properties-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANNIHILATION
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
BOSONS
CHARMONIUM
DECAY
DISTRIBUTION
DISTRIBUTION FUNCTIONS
ELECTROMAGNETIC INTERACTIONS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
FERMIONS
FUNCTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HELICITY
INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MESONS
MULTIPOLE TRANSITIONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTONS
PROBABILITY
PROTON-ANTIPROTON INTERACTIONS
QUARKONIUM
RADIATIVE DECAY