Melosh symmetries of vector-meson decays and a criterion for rapid convergence of semilocal averages. [Amplitude zero, mass splitting, scalar couplings, su(6) groups]
The rapid t = 0 convergence of the classic superconvergence relation rho..pi.. ..-->.. rho..pi.. and its SU(6) generalizations VM ..-->.. VM (V = vector nonet, M = pseudoscalar or vector nonet) is reexamined. It is suggested that the rapid convergence is due to a zero of the amplitude in t (crossed-channel energy) rather than the rapid falloff of the amplitude with s (''superconvergence'' in s), as is usually assumed. In a separate investigation involving only symmetry arguments, we find that the Melosh-transform parameterization for decays to VV states involves only two undetermined scalar couplings, rather than the four (six) required in related processes involving vector particles, B* ..-->.. B..gamma.. (B* ..-->.. BV) decays, where B is a decuplet or octuplet baryon. A critical discussion is given of the Gilman-Kugler-Meshkov and related prescriptions used to correct SU(6) -symmetric couplings for the effects of mass splitting. (AIP)
- Research Organization:
- Department of Physics, Temple University, Philadelphia, Pennsylvania 19122
- OSTI ID:
- 7356177
- Journal Information:
- Phys. Rev., D; (United States), Vol. 14:3
- Country of Publication:
- United States
- Language:
- English
Similar Records
QCD factorization for charmless hadronic B{sub s} decays revisited
Calculation of Q decay amplitudes and partial widths
Related Subjects
MESON-MESON INTERACTIONS
ELASTIC SCATTERING
VECTOR MESONS
DECAY
MELOSH TRANSFORMATION
REGGE TRAJECTORIES
S CHANNEL
SU-6 GROUPS
SUPERCONVERGENCE RELATIONS
T CHANNEL
BOSONS
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
LIE GROUPS
MESON RESONANCES
MESONS
PARTICLE INTERACTIONS
RESONANCE PARTICLES
SCATTERING
SU GROUPS
SYMMETRY GROUPS
645303* - High Energy Physics- Particle Invariance Principles & Symmetries- Applications to Strong Interactions- (-1987)