A study of the. alpha. sub 0 (980) meson in radiative J/. psi. decays

Conference · Sat Dec 01 04:00:00 EST 1990

OSTI ID:6138683

Lockman, W S ^[1]

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1. California Univ., Santa Cruz, CA (USA). Inst. for Particle Physics

Using the decay sequence J/{psi} {yields} {gamma}X,X {yields} a{sub 0}{sup {plus minus}}(980){pi}{sup {minus plus}}, a{sub 0}{sup {plus minus}}(980) {yields} {eta}{pi}{sup {plus minus}}, where X is the f{sub 1}(1285) or {eta}(1400), the {eta}{pi}{sup +} vs {eta}{pi}{sup {minus}} Dalitz plot intensity distributions are fitted with a model containing a coupled-channel parametrization of the a{sub 0}(980). Preliminary values for the spin of X, the mass and width of the a{sub 0}{sup {plus minus}}(980) to {eta}{pi}{sup {plus minus}}, and the ratio of a{sub 0}{sup +}(980) coupling strengths, g{sub K}{sup 2}/g{sub {eta}}{sup 2}, to {bar K}{sup 0}K{sup +} and {eta}{pi}{sup +} are determined. From this model, the predictions for the ratios of branching ratios r{sub X} = B(X {yields} a{sub 0}(980){pi}){center dot}B(a{sub 0}(980) {yields} K{bar K})/B(X {yields} a{sub 0}{sup {plus minus}}(980){pi}){center dot}B(a{sub 0}{sup {plus minus}}(980) {yields} {eta}{pi}{sup {plus minus}}) are compared with those obtained from MARK III Partial Waves analyses of the decays J/{psi} {yields} {gamma}K{sub s}{sup 0}K{sup {plus minus}}{pi}{sup {minus plus}} and J/{psi} {yields} {gamma}{eta}{pi}{sup +}{pi}{sup {minus}}. 12 refs., 3 figs., 4 tabs.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00515; AC02-76ER01195; AC02-87ER40318; AC03-81ER40050; AM03-76SF00010
• OSTI ID: 6138683
• Report Number(s): SLAC-PUB-5395; CONF-9009309--3; ON: DE91005757
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A0-980 MESONS
AXIAL VECTOR MESONS
BOSONS
BRANCHING RATIO
CHARMONIUM
COUPLED CHANNEL THEORY
ELEMENTARY PARTICLES
F1-1285 MESONS
HADRONS
J PSI-3097 MESONS
MESONS
PARTIAL WAVES
QUARKONIUM
RADIATIVE DECAY
SCALAR MESONS
VECTOR MESONS