Non-relativistic QCD for heavy quark systems
| Autor: | R. R. Horgan, Simon Catterall, I.T. Drummond, Alan Simpson, F.R. Devlin |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Quark
Quantum chromodynamics Physics Nuclear and High Energy Physics Particle physics High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) High Energy Physics::Phenomenology FOS: Physical sciences Gluon High Energy Physics - Lattice Lattice (order) Bound state Rotational invariance High Energy Physics::Experiment Large distance |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 0370-2693 |
| DOI: | 10.1016/0370-2693(93)91352-n |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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