Heavy-Meson Decay Constants: QCD Sum-Rule Glance at Isospin Breaking

Abstract

QCD sum rules for decay constants of heavy mesons with $u$ or $d$ quark yield for $B$ mesons much less isospin breaking than lattice QCD but good agreement for $D$ mesons.

arXiv comment5 pages, 2 figures, contributed to "QCD@Work 2016 - International Workshop on Quantum Chromodynamics: Theory and Experiment" (27 - 30 June 2016, Martina Franca, Italy)

References in corpus (21)

• Big-Bang Nucleosynthesis
• Charmed and light pseudoscalar meson decay constants from four-flavor lattice QCD with physical light quarks
• B-meson decay constants: a more complete picture from full lattice QCD
• f_B and f_B_s from QCD sum rules
• Decay constants of heavy-light vector mesons from QCD sum rules
• Isospin breaking effects due to the up-down mass difference in Lattice QCD
• The effective continuum threshold in dispersive sum rules
• OPE, charm-quark mass, and decay constants of D and D_s mesons from QCD sum rules
• Decay constants of heavy pseudoscalar mesons from QCD sum rules
• Systematic uncertainties of hadron parameters obtained with QCD sum rules
• Decay constants of the charmed vector mesons $D^{\ast }$ and $D_s^{\ast }$ from QCD sum rules
• Three-loop non-diagonal current correlators in QCD and NLO corrections to single-top-quark production
• B-meson decay constants from 2+1-flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks
• Can one control systematic errors of QCD sum rule predictions for bound states?
• Accuracy of bound-state form factors extracted from dispersive sum rules
• Hadron form factors from sum rules for vacuum-to-hadron correlators
• Effective continuum threshold for vacuum-to-bound-state correlators
• Accurate decay-constant ratios $f_{B^{\ast }}/f_B$ and $f_{B_s^{\ast }}/f_{B_s}$ from Borel QCD sum rules
• Decay Constants of Beauty Mesons from QCD Sum Rules
• QCD sum-rule results for heavy-light meson decay constants and comparison with lattice QCD
• Precise Ratios of Decay Constants of Vector over Pseudoscalar $B_{(s)}$ Mesons

Cited by in corpus (1)

• Heavy-Meson Decay Constants: Isospin Breaking from QCD Sum Rules