Vector meson photoproduction studied in its radiative decay channel

Journal Article · Sun May 01 00:00:00 EDT 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.71.054004· OSTI ID:20698649

Qiang, Zhao; Al-Khalili, J S ^[1]; Cole, P L ^[2]

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1. Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)
2. Department of Physics, Idaho State University, Pocatello, Idaho 83209 (United States)

We provide an analysis of vector meson photoproduction in the channel of the vector meson decaying into a pseudoscalar meson plus a photon (i.e., V{yields}P{gamma}). It is shown that nontrivial kinematic correlations arise from the measurement of the P{gamma} angular distributions in the overall c.m. system in comparison with those in the vector meson rest frame. The implication of such kinematic correlations in the measurement of polarization observables is discussed in terms of the vector meson density matrix elements. For {omega} meson production, because of its relatively large branching ratios for {omega}{yields}{pi}{sup 0}{gamma}, additional events from this channel may enrich the information about the reaction mechanism and improve the statistics of the recent measurement of polarized beam asymmetries by the GRAAL Collaboration. For {phi}{yields}{eta}{gamma},{rho}{yields}{pi}{gamma}, and K{sup *}{yields}K{gamma}, we expect that additional information about the spin structure of the vector meson production vertex can be derived.

• OSTI ID: 20698649
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 71, Issue 5; Other Information: DOI: 10.1103/PhysRevC.71.054004; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ASYMMETRY
BRANCHING RATIO
COMPARATIVE EVALUATIONS
CORRELATIONS
DENSITY MATRIX
ETA MESONS
HADRONIC PARTICLE DECAY
K*-892 MESONS
KAONS
NUCLEAR REACTION KINETICS
OMEGA-782 MESONS
PHOTONS
PHOTOPRODUCTION
PIONS NEUTRAL
POLARIZATION
POLARIZED BEAMS
RADIATIVE DECAY
RHO-770 MESONS
SPIN