HAL : in2p3-00173955, version 1
 arXiv : 0709.3154
 Physical Review Letters 100 (2007) 052001
 A Bayesian analysis of pentaquark signals from CLAS data
 CLAS Collaboration(s)
 (2007)
 We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a $\Theta^{+}$ pentaquark, whilst the other found no such evidence. The unique feature of these two experiments was that they were performed with the same experimental setup. Using a Bayesian analysis we find that the results of the two experiments are in fact compatible with each other, but that the first measurement did not contain sufficient information to determine unambiguously the existence of a $\Theta^{+}$. Further, we suggest a means by which the existence of a new candidate particle can be tested in a rigorous manner.
 Thème(s) : Physique/Physique des Hautes Energies - Phénoménologie
 Mot(s)-clé(s) : pentaquark – CLAS – Bayesian
 Lien vers le texte intégral : http://fr.arXiv.org/abs/0709.3154
 in2p3-00173955, version 1 http://hal.in2p3.fr/in2p3-00173955 oai:hal.in2p3.fr:in2p3-00173955 Contributeur : Dominique Girod <> Soumis le : Vendredi 21 Septembre 2007, 10:29:44 Dernière modification le : Jeudi 7 Février 2008, 10:21:28