2026-04-18T04:24:06Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1315112025-12-05T16:46:27Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Pérez-Nadal, Guillem author Soto Riera, Joan author 2019-04-05T10:04:38Z 2019-04-05T10:04:38Z 2009-06-01 2019-04-05T10:04:38Z The dynamics of heavy quarkonium systems in the strong coupling regime reduces to a quantum mechanical problem with a number of potentials which may be organized in powers of 1 / m , m being the heavy quark mass. The potentials must be calculated nonperturbatively, for instance, in lattice QCD. It is well known that the long-distance behavior of the static ( 1 / m 0 ) potential is well reproduced by an effective string theory. We show that this effective string theory, if correct, should also reproduce the long-distance behavior of all 1 / m suppressed potentials. We demonstrate the practical usefulness of this result by finding a suitable parameterization of the recently calculated 1 / m potential. We also calculate the 1 / m 2 velocity-dependent and spin-dependent potentials. Once Poincaré invariance is implemented, the shapes of most of the spin-independent potentials are fully predicted in terms of the string tension and the shapes of the spin-dependent ones in terms of a single parameter. Quarks Nivells d'energia (Mecànica quàntica) Quarks Energy levels (Quantum mechanics) Effective-string-theory constraints on the long-distance behavior of the subleading potentials