62 articles – 636 Notices  [english version]
 HAL : in2p3-00596739, version 1
 arXiv : 1105.5630
 Physics Letters B 703 (2011) 274-280
 Relation between $T_{cc}$ and X(3872) from QCD
 (2011)
 We have studied, using double ratio of QCD (spectral) sum rules, the ratio between the masses of $T_{cc}$ and X(3872) assuming that they are respectively described by the $D-{D}^*$ and $D-\bar{D}^*$ molecular currents. We found (within our approximation) that the masses of these two states are almost degenerate. Since the pion exchange interaction between these mesons is exactly the same, we conclude that if the observed X(3872) meson is a $D\bar{D}^*+c.c.$ molecule, then the $DD^*$ molecule should also exist with approximately the same mass. An extension of the analysis to the $b$-quark case leads to the same conclusion. We also study the SU(3) breakings for the $T^s_{QQ}/T_{QQ}$ mass ratios.
 équipe(s) de recherche : Theorie
 Thème(s) : Physique/Physique des Hautes Energies - ExpériencePhysique/Physique des Hautes Energies - Phénoménologie
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1105.5630
 in2p3-00596739, version 1 http://hal.in2p3.fr/in2p3-00596739 oai:hal.in2p3.fr:in2p3-00596739 Contributeur : Sylvie Florès <> Soumis le : Lundi 30 Mai 2011, 07:57:27 Dernière modification le : Jeudi 15 Septembre 2011, 11:29:46