QCD sum rules study of Ξc and Ξb baryons
Tipo
Artigo
Data de publicação
2007
Periódico
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Citações (Scopus)
40
Autores
Duraes F.O.
Nielsen M.
Nielsen M.
Orientador
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Programa
Resumo
We use QCD sum rules to study the masses of the baryons Ξc and Ξb. We work with a current where the strange and the light quarks are in a relative spin zero, at leading order in αs. We consider the contributions of condensates up to dimension six. For Ξb we get mΞb = (5.75 ± 0.25) GeV, and for Ξc we get mΞc = (2.5 ± 0.2) GeV, both in excellent agreement with the experimental values. We also make predictions to the state Ωb (s s b) obtaining mΩb = (5.82 ± 0.23) GeV. © 2007 Elsevier B.V. All rights reserved.