Non-Relativistic QCD for Heavy Quark Systems

Abstract

We employ a nonrelativistic version of QCD (NRQCD) to study heavy quark-antiquark bound states in the lowest approximation without fine structure. We use gluon configurations on a 16^3 by 48 lattice at beta=6.2 from the UKQCD collaboration. For quark masses in the vicinity of the b we obtain bound state masses for S, P and both types of D wave. We also detect signals for two types of hybrids (quark,antiquark,gluon states). The results are sufficiently accurate to confirm that the values of the D wave mass from both lattice D waves coincide indicating that the cubical invariance of the lattice is restored to full rotational invariance at large distance. Our results also show that the S-P splitting is indeed insensitive to variations in the bare quark mass from Ma=1.0 to Ma=1.9.

13 pages, DAMTP-92-70

References in corpus (1)

• Improved Nonrelativistic QCD for Heavy Quark Physics

Cited by in corpus (10)

• Exotic mesons in quenched lattice QCD
• Measuring the aspect ratio renormalization of anisotropic-lattice gluons
• Improved Upsilon Spectrum with Dynamical Wilson Fermions
• Upsilon Spectrum from NRQCD with Improved Action
• Lattice Investigations of the Running Coupling
• From Spectroscopy to the Strong Coupling Constant with Heavy Wilson Quarks
• Radial Excited States for Heavy Quark Systems in NRQCD
• Exotic hybrid mesons with light quarks
• A systematic analysis of transverse momentum spectra of $J/\psi$ mesons in high energy collisions
• Glueballs and Hybrids (Gluons as Constituents)