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2007-02-16 - Article/Dans un journal avec peer-review - Anglais - 4 page(s)

Buisseret Fabien , Semay Claude , Mathieu Vincent , "Retardation effects in the rotating string model" in European Physical Journal A -- Hadrons & Nuclei, 31, Issue 4, 616-619.

  • Edition : Springer Science & Business Media B.V., New York (NY)
  • Codes CREF : Physique des particules élémentaires (DI1221), Physique théorique et mathématique (DI1210)
  • Unités de recherche UMONS : Physique nucléaire et subnucléaire (S824)
  • Centres UMONS : Algèbre, Géométrie et Interactions fondamentales (AGIF)
Texte intégral :

Abstract(s) :

(Anglais) A new method to study the retardation effects in mesons is presented. It is based on a generalized rotating string model, in which a nonzero value of the relative time between the quark and the antiquark is allowed. This approach leads to a retardation term in the Hamiltonian which behaves as a perturbation of the nonretarded Hamiltonian and preserves the Regge trajectories for light mesons. The straight-line ansatz is used to describe the string, and the relevance of this approximation is tested. It is shown that the string is actually curved because of retardation, but this bending does not bring a relevant contribution to the energy spectrum of the model.

Identifiants :
  • DOI : 10.1140/epja/i2006-10182-9