Spin splittings of heavy-quark bound states from lattice QCD

Journal Article · Tue Dec 01 00:00:00 EST 1987 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.36.3450· OSTI ID:5509898

Campostrini, M; Moriarty, K; Rebbi, C

The spin-dependent potentials which determine the spin splittings of heavy-quark bound states are evaluated by a lattice Monte Carlo calculation. One of the spin-orbit potentials is found to have a long-range nonperturbative component, while all other potentials exhibit a short-ranged perturbative behavior. Calculations at two different values of the bare coupling constant demonstrate scaling. The spin splittings that follow from the calculated potentials are evaluated. Good agreement is found with experimental data provided that vacuum-polarization effects from qq-bar pairs at short distances are taken into account.

• Research Organization: Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Pisa, Italy
• OSTI ID: 5509898
• Journal Information: Phys. Rev. D; (United States), Vol. 36:11
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
LATTICE FIELD THEORY
L-S COUPLING
QUARKS
BOUND STATE
MONTE CARLO METHOD
QUANTUM CHROMODYNAMICS
SU-3 GROUPS
COUPLING
ELEMENTARY PARTICLES
FIELD THEORIES
INTERMEDIATE COUPLING
LIE GROUPS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
SU GROUPS
SYMMETRY GROUPS
645400* - High Energy Physics- Field Theory
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