skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

Decay Constants of Beauty Mesons from QCD Sum Rules

Lucha, Wolfgang ; Melikhov, Dmitri ; Simula, Silvano Corianò, C. ; Creanza, D. ; Nappi, E. ; Bruno, G.E. ; Colangelo, P. ; Chiodini, G. ; De Fazio, F.

EPJ Web of conferences, 2014-01, Vol.80, p.46-6 [Periódico revisado por pares]

EDP Sciences

Texto completo disponível

Citações Citado por
  • Título:
    Decay Constants of Beauty Mesons from QCD Sum Rules
  • Autor: Lucha, Wolfgang ; Melikhov, Dmitri ; Simula, Silvano
  • Corianò, C. ; Creanza, D. ; Nappi, E. ; Bruno, G.E. ; Colangelo, P. ; Chiodini, G. ; De Fazio, F.
  • Assuntos: Constants ; Decay ; Mathematical analysis ; Mesons ; Quantum chromodynamics ; Scale (ratio) ; Sum rules ; Vectors (mathematics)
  • É parte de: EPJ Web of conferences, 2014-01, Vol.80, p.46-6
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Our recently completed analysis of the decay constants of both pseudoscalar and vector beauty mesons reveals that in the bottom-quark sector two specific features of the sum-rule predictions show up: (i) For the input value of the bottom-quark mass in the MS scheme m sub(b)(m sub(b)) approximately 4.18 GeV, the sum-rule result f sub(B) approximately 210-220 MeV for the B meson decay constant is substantially larger than the recent lattice-QCD finding f sub(B) approximately 190 MeV. Requiring QCD sum rules to reproduce the lattice-QCD value of f sub(B) yields a significantly larger b-quark mass: m sub(b)(m sub(b)) = 4.247 GeV. (ii) Whereas QCD sum-rule predictions for the charmed-meson decay constants f sub(D), f sub(Ds), fdD* and f sub(D*s) are practically independent of the choice of renormalization scale, in the beauty sector the results for the decay constants- and especially for the ratio f sub(B*)/f sub(B)-prove to be very sensitive to the specific scale setting.
  • Editor: EDP Sciences
  • Idioma: Inglês
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  2 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.