Triangle quark diagrams in the decays of scalar mesons

Journal Article · Thu Jul 01 04:00:00 EDT 1982 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:5540247

Ivanov, A N; Troitskaya, N I

Assuming the dominance of the anomalous parts of the quark diagrams in the amplitudes for the decays S..-->..P+P' and S..-->..V+V' (where V(V') is a vector meson or a photon), we have calculated the probabilities of the strong and electromagnetic two-particle decays of the J/sup P/ = 0/sup +/ scalar mesons delta(980), kappa-cur(1500), epsilon-c(1300), S( (980), and chi(3415). We have found the mixing angle of the eighth component of the octet with the singlet for the states epsilon-c(1300) and S*(980) to be theta/sub S/ = 53 +- 4/sup 0/. We have calculated the probabilities of the decays J/psi..-->..S+V and the total width of the decay channels of the meson chi(3415). The latter quantity was calculated using the prescription of Appelquist and Politzer. From the dominance of the structureless anomalous part of the SVV' quark diagram in the decays S..--> gamma gamma.. and S..-->..V..gamma.. we come to the conclusion that the form factors in decays of the type S..-->..Vl/sup +/l/sup -/ and V..-->..Sl/sup +/l/sup -/ are determined by the contributions of the virtual vector mesons, in accordance with the vector-dominance model. With the corresponding form factors we get a convergent expression for the amplitude of the process S..-->..l/sup +/l/sup -/, and hence we are able to calculate the probability of this decay.

• Research Organization: M. I. Kalinin Polytechnic Institute, Leningrad
• OSTI ID: 5540247
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 36:1; ISSN SJNCA
• 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
AMPLITUDES
BOSONS
CHI-3410 RESONANCES
COMPOSITE MODELS
DECAY
DECAY AMPLITUDES
DELTA-966 RESONANCES
ELEMENTARY PARTICLES
HADRONIC PARTICLE DECAY
HADRONS
MATHEMATICAL MODELS
MESON RESONANCES
MESONS
PARTICLE DECAY
PARTICLE MODELS
PSI RESONANCES
PSI-3105 RESONANCES
QUARK MODEL
RADIATIVE DECAY
RESONANCE PARTICLES
SCALAR MESONS
TRANSITION AMPLITUDES
VECTOR MESONS