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Title: | Effective-string-theory constraints on the long-distance behavior of the subleading potentials |
Author: | Pérez-Nadal, Guillem Soto Riera, Joan |
Keywords: | Quarks Nivells d'energia (Mecànica quàntica) Quarks Energy levels (Quantum mechanics) |
Issue Date: | 1-Jun-2009 |
Publisher: | American Physical Society |
Abstract: | 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.79.114002 |
It is part of: | Physical Review D, 2009, vol. 79, num. 11, p. 114002 |
URI: | http://hdl.handle.net/2445/131511 |
Related resource: | https://doi.org/10.1103/PhysRevD.79.114002 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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