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 MESON DECAY IN AN INDEPENDENT QUARK MODEL

2000 ◽  
Vol 09 (05) ◽  
pp. 407-415 ◽  
Author(s):  
HAKAN CİFTCİ ◽  
HÜSEYIN KORU
Keyword(s):  
Experimental Data ◽  
Quark Model ◽  
Weak Decay ◽  
Leptonic Decay ◽  
Meson Decay ◽  
Decay Constants ◽  
Pseudoscalar Mesons ◽  
Light Vector ◽  
Decay Widths ◽  
Good Agreement

Leptonic decay widths and leptonic decay constants of light vector mesons and weak leptonic decay widths and weak decay constants of light and heavy pseudoscalar mesons have been studied in a field-theoretic framework based on the independent quark model with a scalar-vector power-law potential. The results are in very good agreement with the experimental data.

scholarly journals Distribution amplitudes of heavy mesons and quarkonia on the light front

2020 ◽  
Vol 80 (10) ◽  
Author(s):  
Fernando E. Serna ◽  
Roberto Correa da Silveira ◽  
J. J. Cobos-Martínez ◽  
Bruno El-Bennich ◽  
Eduardo Rojas
Keyword(s):  
Heavy Quark ◽  
Pion Mass ◽  
Heavy Meson ◽  
Light Front ◽  
Effective Theory ◽  
Heavy Quark Effective Theory ◽  
Decay Constants ◽  
Quark Sector ◽  
Pseudoscalar Mesons ◽  
Inverse Moment

AbstractThe ladder kernel of the Bethe–Salpeter equation is amended by introducing a different flavor dependence of the dressing functions in the heavy-quark sector. Compared with earlier work this allows for the simultaneous calculation of the mass spectrum and leptonic decay constants of light pseudoscalar mesons, the $$D_u$$ D u , $$D_s$$ D s , $$B_u$$ B u , $$B_s$$ B s and $$B_c$$ B c mesons and the heavy quarkonia $$\eta _c$$ η c and $$\eta _b$$ η b within the same framework at a physical pion mass. The corresponding Bethe–Salpeter amplitudes are projected onto the light front and we reconstruct the distribution amplitudes of the mesons in the full theory. A comparison with the first inverse moment of the heavy meson distribution amplitude in heavy quark effective theory is made.

scholarly journals Heavy-Quark Mass and Heavy-Meson Decay Constants from QCD Sum Rules

2011 ◽  
Author(s):  
Wolfgang Lucha ◽  
Dmitri Melikhov ◽  
Silvano Simula
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Sum Rules ◽  
Heavy Meson ◽  
Meson Decay ◽  
Qcd Sum Rules ◽  
Decay Constants ◽  
Heavy Quark Mass

scholarly journals Ratios ofB andD meson decay constants with heavy quark symmetry

Pramana ◽  
1996 ◽  
Vol 47 (3) ◽  
pp. 261-261
Author(s):  
A K Giri ◽  
L Maharana ◽  
R Mohanta
Keyword(s):  
Heavy Quark ◽  
Meson Decay ◽  
Decay Constants ◽  
Heavy Quark Symmetry

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

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 SYMMETRIES AND SYSTEMATICS OF DOUBLY HEAVY HADRONS

2012 ◽  
Vol 27 (08) ◽  
pp. 1250039 ◽  
Author(s):  
B. EAKINS ◽  
W. ROBERTS
Keyword(s):  
Experimental Data ◽  
Excitation Energy ◽  
Heavy Quark ◽  
Quark Model ◽  
Strange Quark ◽  
Heavy Meson ◽  
Heavy Quarks ◽  
Heavy Mesons ◽  
Heavy Baryons

We discuss the extension of the superflavor symmetry of doubly heavy baryons to states which contain an excited heavy diquark and we examine some of the consequences of this symmetry for the spectra of doubly heavy baryons and heavy mesons. We explore the ramifications of a proposed symmetry that relates heavy diquarks to doubly heavy mesons. We present a method for determining how the excitation energy of a system containing two heavy quarks will scale as one changes the strength of the interactions and the reduced mass of the system. We use this to derive consequences of the heavy diquark-doubly heavy meson symmetry. We compare these consequences to the results of a quark model as well as the experimental data for doubly and singly heavy mesons. We also discuss the possibility of treating the strange quark as a heavy quark and apply the ideas developed here to strange hadrons.

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