Research in theoretical nuclear physics: Progess report, 1 December 1987--30 November 1988

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6603704

Liu, Keh-Fei

Several projects on the lattice gauge Monte Carlo calculations are completed. The decay constants for vector and pseudoscalar mesons are calculated with both Wilson and staggered fermions. In this way, the fermion universality is checked. A study is made to measure the axial vector coupling of the nucleon. The ratio of the g/sub A//g/sub V/ is measured to be about 1.1 which is close to the experimental value. The pion form factor is measured in SU(3) for the first time with a beta value of 5.9. We have made a breakthrough on the identification of the tensor meson this past year. By incorporating a soft form factor, we can show that theta(f2(1720))'s decay pattern is flavor independent. Other experimental results lend their strong support for such a form factor. There are two experiments which indicate that there are essentially no quarks in theta. In the context of QCD, we conclude that theta must be a tensor glueball. We also used the tensor dominance model to calculate the branching ratio of the tensor glueball in J//psi/ radiative decay. On the front of skyrmion, we have shown that there is an isosinglet axial vector current in the Skyrme model. Its integral is simply the spin operator. Thus we show that there is no relation between the skyrmion and the quark helicity deduced from the recent EMC experiment on the spin structure of the proton. A Ph.D. student is finishing up his thesis on the Skyrmion-Landau parametrization of the N-N interactions. The results on the two particle spectra of YO and YF show that we still need a tensor force. The controversy over the damping of color oscillations in a quark gluon plasma is resolved through a gauge-invariant linear-response analysis. It is speculated that the quark gluon phase is non-perturbative no matter how high the temperature is. Topological non-abelian phases are bound in gauge theories with chiral fermions.

• Research Organization: Kentucky Univ., Lexington (USA)
• DOE Contract Number: FG05-84ER40154
• OSTI ID: 6603704
• Report Number(s): DOE/ER/40154-4; ON: DE89005950
• Country of Publication: United States
• Language: English

Related Subjects

645200 -- High Energy Physics-- Particle Interactions & Properties-Theoretical
653002* -- Nuclear Theory-- Nuclear Matter
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BINDING ENERGY
BOSONS
BRANCHING RATIO
CHARMONIUM
DOCUMENT TYPES
ELEMENTARY PARTICLES
ENERGY
F2-1720 MESONS
FIELD THEORIES
GLUEBALLS
HADRONS
INTERACTIONS
J PSI-3097 MESONS
LATTICE FIELD THEORY
MESONS
MONTE CARLO METHOD
NUCLEAR THEORY
PARTICLE INTERACTIONS
PROGRESS REPORT
QUANTUM FIELD THEORY
QUARK-GLUON INTERACTIONS
QUARKONIUM
RESEARCH PROGRAMS
TENSOR MESONS
VECTOR MESONS