Lattice heavy-meson decay constants and fermion universality

1989 ◽  
Vol 39 (3) ◽  
pp. 978-981 ◽  
Author(s):  
R. M. Woloshyn ◽  
T. Draper ◽  
K. F. Liu ◽  
W. Wilcox
Keyword(s):  
Heavy Meson ◽  
Meson Decay ◽  
Decay Constants

scholarly journals Heavy-meson decay constants from QCD sum rules

2010 ◽  
Author(s):  
Wolfgang Lucha ◽  
Dmitri Melikhov ◽  
Silvano Simula ◽  
Leonardo Angelini ◽  
Pietro Colangelo ◽  
...  
Keyword(s):  
Sum Rules ◽  
Heavy Meson ◽  
Meson Decay ◽  
Qcd Sum Rules ◽  
Decay Constants

B-MESON DECAY CONSTANT REVISITED AND EXTRACTION OF $|\frac{v_{td}}{v_{ts}}|$ FROM $B^0\hbox{--}{\bar B}^0$ MIXING

2004 ◽  
Vol 19 (12) ◽  
pp. 921-925 ◽  
Author(s):  
A. BHATTACHARYA ◽  
S. N. BANERJEE ◽  
B. CHAKRABARTI ◽  
S. BANERJEE
Keyword(s):  
Variational Method ◽  
Decay Constant ◽  
B Meson ◽  
Heavy Meson ◽  
Meson Decay ◽  
Matrix Elements ◽  
Ckm Matrix ◽  
B Meson Decay ◽  
Decay Constants ◽  
Good Agreement

The ratios of Bd and Bs meson decay constant have been estimated using the variational method in conjunction with the relativistic Hamiltonian of the heavy meson in the framework of the statistical model. The ratio of CKM matrix elements [Formula: see text] has been extracted from [Formula: see text] mixing using the estimated decay constants and ratio of Bd and Bs mass differences. The results are found to be in good agreement with the existing theoretical and experimental predictions.

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

2016 ◽  
Vol 129 ◽  
pp. 00026
Author(s):  
Wolfgang Lucha ◽  
Dmitri Melikhov ◽  
Silvano Simula
Keyword(s):  
Heavy Meson ◽  
Meson Decay ◽  
Isospin Breaking ◽  
Sum Rule ◽  
Decay Constants

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

2017 ◽  
Vol 137 ◽  
pp. 06017
Author(s):  
Wolfgang Lucha ◽  
Dmitri Melikhov ◽  
Silvano Simula
Keyword(s):  
Sum Rules ◽  
Heavy Meson ◽  
Meson Decay ◽  
Isospin Breaking ◽  
Qcd Sum Rules ◽  
Decay Constants

scholarly journals HEAVY PSEUDOSCALAR-MESON DECAY CONSTANTS WITH STRANGENESS FROM THE EXTENDED NONLOCAL CHIRAL-QUARK MODEL

2012 ◽  
Vol 27 (27) ◽  
pp. 1250153 ◽  
Author(s):  
SEUNG-IL NAM
Keyword(s):  
Heavy Quark ◽  
Quark Model ◽  
Weak Decay ◽  
Heavy Meson ◽  
Effective Field ◽  
Numerical Results ◽  
Meson Decay ◽  
Chiral Quark Model ◽  
Decay Constants ◽  
Pseudoscalar Mesons

We study the weak-decay constants for the heavy pseudoscalar mesons, D, Ds, B and Bs. For this purpose, we employ the extended nonlocal chiral-quark model (ExNLChQM), motivated by the heavy-quark effective field theory as well as the instanton-vacuum configuration. In addition to the heavy-quark symmetry and the nonlocal interactions between quarks and pseudoscalar mesons in ExNLChQM, a correction for the strange-quark content inside Ds and Bs is also taken into account and found to be crucial to reproduce the empirical values. From those numerical results, we obtain fD, Ds, B, Bs = (207.53, 262.56, 208.13, 262.39) MeV , which are in good agreement with experimental data and other theoretical estimations. Using those numerical results, we estimate the CKM matrix elements and the Cabibbo angle with the various mesonic and leptonic heavy-meson decay channels, resulting in (|Vcd|, |Vcs|, |Vub|, |Vtd|/|Vts|) = (0.224, 0.968, <5.395×10-3, 0.215) and θC = 12.36° which are well compatible with available data.

scholarly journals Heavy Meson Decay Constants from Quenched Lattice QCD

1998 ◽  
Vol 80 (26) ◽  
pp. 5711-5715 ◽  
Author(s):  
S. Aoki ◽  
M. Fukugita ◽  
S. Hashimoto ◽  
N. Ishizuka ◽  
Y. Iwasaki ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Heavy Meson ◽  
Meson Decay ◽  
Decay Constants

scholarly journals Isospin breaking in Heavy-Meson Decay Constants

2018 ◽  
Author(s):  
Dmitri Melikhov ◽  
Wolfgang Lucha ◽  
Silvano Simula
Keyword(s):  
Heavy Meson ◽  
Meson Decay ◽  
Isospin Breaking ◽  
Decay Constants
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