Possible exotic mesons in the charmonium region

Journal Article · Sat Mar 01 04:00:00 EST 1980 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.21.1350· OSTI ID:5660502

Liu, K F; Wong, C W

We consider the possibility that a number of PC=++ mesons might appear in the charmonium region below psi' (3.69 GeV). They are states made up of admixtures of cc-barg (g=gluon), cc-barqq-bar (q=u,d), and the charmonium /sup 3/P/sub J/ states. Masses, decay widths, and mixing matrix elements are studied with the help of the model of Horn and Mandula for cc-barg states and the results of Jaffe, and De Rujula and Jaffe, for cc-barqq-bar states. The presence of a cc-bar pair suggests narrow hadronic widths if the mass is below the breakup thresholds of the cc-barqq-bar states. Their branching ratios for ..gamma.. transitions and 2..gamma.. annihilations appear to be fairly small. They may have rather large spin-spin splittings. It is plausible that the lowest-mass states contain mostly cc-barg configurations. Although they share part of the charmonium /sup 3/P/sub J/ ..gamma..-cascade strengths, it is likely that they are more readily produced in the hadronic decays of vector mesons in e/sup +/e/sup -/ annihilations. We also discuss the possible appearance of similar states in the UPSILON region and among light mesons. We suggest in particular that strange mesons in suitable decay modes might well provide the most ready experimental access to such gluon and four-quark states.

• Research Organization: Physics Department, University of California, Los Angeles, California 90024
• OSTI ID: 5660502
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 21:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645205* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. = 0-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
ANNIHILATION
BASIC INTERACTIONS
BOSONS
BOUND STATE
BRANCHING RATIO
CHARM PARTICLES
CHARMED MESON RESONANCES
CHARMONIUM
COMPOSITE MODELS
DECAY
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
EXOTIC RESONANCES
GAMMA CASCADES
GAMMA SPECTRA
GLUONS
HADRONIC PARTICLE DECAY
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MASS
MATHEMATICAL MODELS
MATRIX ELEMENTS
MESON RESONANCES
MESONS
NUCLEAR CASCADES
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PARTICLE WIDTHS
POSTULATED PARTICLES
PSI RESONANCES
QUANTUM NUMBERS
QUARK MODEL
RESONANCE PARTICLES
SPECTRA
SPIN
VECTOR MESONS