Tests for gluonium or other non-qq-bar admixtures in the f(1270)
Creators
- 1. Research Institute for Fundamental Physics, Kyoto University, Kyoto 606, Japan
Description
SU(3) and SU(6) suggest GAMMA(f→ππ) = 112--115 MeV for a quark-antiquark state, while the observed value is 148 +- 17 MeV. This small discrepancy permits a non-qq-bar admixture (''gg'') in the f: Vertical Barf> = costhetaVertical Barqq-bar>+sinthetaVertical Bargg>. We examine the possibility that the orthogonal state f/sup perpendicular/ = -sinthetaVertical Barqq-bar>+costhetaVertical Bargg> decouples from ππ, and find sin2theta = 0.15/sup +0.05//sub -0.06/. Consequences include a diminished predicted rate for f→γγ, in qualitative accord with experiment; a mass formula f/sup perpendicular/-A2 = cot2theta(A2-f) yielding f/sup perpendicular/ in the range 1.45--1.87 GeV/c2; and predictions for f/sup() perpendicular/ spectra as produced in γγ→f/sup() perpendicular/ or J/psi→f/sup() perpendicular/+γ and detected in f→KK-bar, rhoγ, or γγ. The width of f/sup perpendicular/ is estimated to be no more than 40 MeV under these assumptions
Additional details
Publishing Information
- Journal Title
- Phys. Rev., D
- Journal Volume
- 24
- Journal Issue
- 5
- Series
- Phys. Rev., D.
- Journal Page Range
- 1347-1355
- ISSN
- 0556-2821
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 13646612
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- BAG MODEL; BOUND STATE; F-1260 RESONANCES; GAMMA RADIATION; GLUONS; HADRONIC PARTICLE DECAY; PARITY; PARTICLE WIDTHS; PIONS; QUANTUM CHROMODYNAMICS; QUARKS; SPIN; SU-3 GROUPS; SU-6 GROUPS
- Descriptors DEC
- ANGULAR MOMENTUM; BOSONS; DECAY; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; EXTENDED PARTICLE MODEL; FIELD THEORIES; HADRONS; IONIZING RADIATIONS; LIE GROUPS; MATHEMATICAL MODELS; MESON RESONANCES; MESONS; PARTICLE DECAY; PARTICLE MODELS; PARTICLE PROPERTIES; POSTULATED PARTICLES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; RADIATIONS; RESONANCE PARTICLES; SU GROUPS; SYMMETRY GROUPS