210 articles – 1947 Notices  [english version]
 HAL : in2p3-00272477, version 1
 XIV International Symposium on Very High Energy Cosmic Ray Interactions, Weihai : Chine (2006)
 Micro-canonical pentaquark production in $e^+e^−$ and pp collisions
 (2008)
 The existence of pentaquarks became questionable, because the Θ+ peak is observed in some p+p collisions, but not in e+e− annihilations. People think initial baryon number is necessary to produce pentaquarks. In this paper, we estimate and compare the production of Θ+(1540) and Ξ−−(1860) in e+e− and pp collisions at different energies using Fermi statistical model as originally proposed in its microcanonical form. We find that both Θ+(1540) and Ξ−−(1860) yield more in e+e− at LEP energies than in pp collisions at SPS and RHIC energies, if pentaquarks do exist. Initial baryon number is not necessary for pentaquark production.
 Thème(s) : Physique/Physique des Hautes Energies - Phénoménologie
 in2p3-00272477, version 1 http://hal.in2p3.fr/in2p3-00272477 oai:hal.in2p3.fr:in2p3-00272477 Contributeur : Dominique Girod <> Soumis le : Vendredi 11 Avril 2008, 15:23:35 Dernière modification le : Vendredi 11 Avril 2008, 15:27:15