Heavy-Light Exotics from QCD Laplace Sum Rules at N2LO in the chiral limit - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2017

Heavy-Light Exotics from QCD Laplace Sum Rules at N2LO in the chiral limit

R. M Albuquerque
  • Fonction : Auteur
F. Fanomezana
  • Fonction : Auteur
A. Rabemananjara
  • Fonction : Auteur
D. Rabetiarivony
  • Fonction : Auteur
G. Randriamanatrika
  • Fonction : Auteur

Résumé

These talks review and summarize our results in [1, 2] on XYZ -like spectra obtained from QCD Laplace Sum Rule in the chiral limit at next-to-next-leading order (N2LO) of perturbation theory (PT) and including leading order (LO) contributions of dimensions d≤6−8 non-perturbative condensates. We conclude that the observed XZ states are good candidates for 1+ and 0+ molecules or / and four-quark states while the predictions for 1− and 0− states are about 1.5 GeV above the Yc,b experimental candidates and hadronic thresholds. We (numerically) find that these exotic molecules couple weakly to the corresponding interpolating currents than ordinary D , B heavy-light mesons while we observe that these couplings decrease faster [ 1/mb3/2 (resp. 1/mb ) for the 1+ , 0+ (resp. 1− , 0− ) states] than 1/mb1/2 . results do not also confirm the existence of the X (5568) state in agreement with LHCb findings.

Dates et versions

hal-01554520 , version 1 (03-07-2017)

Identifiants

Citer

R. M Albuquerque, S. Narison, F. Fanomezana, A. Rabemananjara, D. Rabetiarivony, et al.. Heavy-Light Exotics from QCD Laplace Sum Rules at N2LO in the chiral limit. 19th High-Energy Physics International Conference in Quantum Chromodynamics, Jul 2016, Montpellier, France. pp.83-91, ⟨10.1016/j.nuclphysbps.2016.12.016⟩. ⟨hal-01554520⟩
45 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More