scholarly journals Symmetry-breaking corrections to meson decay constants in the heavy-quark effective theory

1992 ◽  
Vol 46 (3) ◽  
pp. 1076-1087 ◽  
Author(s):  
Matthias Neubert
Keyword(s):  
Symmetry Breaking ◽  
Heavy Quark ◽  
Effective Theory ◽  
Meson Decay ◽  
Heavy Quark Effective Theory ◽  
Decay Constants

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 A CONSISTENT CALCULATION OF HEAVY MESON DECAY CONSTANTS AND TRANSITION WAVE FUNCTIONS IN THE COMPLETE HQEFT

2001 ◽  
Vol 16 (03) ◽  
pp. 377-408 ◽  
Author(s):  
W. Y. WANG ◽  
Y. L. WU
Keyword(s):  
Heavy Quark ◽  
Bound States ◽  
Scaling Law ◽  
Wave Functions ◽  
Effective Theory ◽  
Meson Decay ◽  
Sum Rule ◽  
Decay Constants ◽  
Rule Approach ◽  
Light Mesons

Within the complete heavy quark effective field theory (HQEFT), the QCD sum rule approach is used to evaluate the decay constants including 1/mQcorrections and the Isgur–Wise function and other additional important wave functions concerned at 1/mQfor the heavy–light mesons. The number of unknown wave functions or form factors in HQEFT is shown to be much less than the one in the usual heavy quark effective theory (HQET). The values of wave functions at zero recoil are found to be consistent with the ones extracted from the interesting relations (which are resulted from the HQEFT) between the hadron masses and wave functions at zero recoil. The results for the decay constants are consistent with the ones from full QCD sum rule and Lattice calculations. The 1/mQcorrections to the scaling law [Formula: see text] are found to be small in HQEFT, which demonstrates again the validity of 1/mQexpansion in HQEFT. It is also shown that the residual momentum v·k of heavy quark within heavy–light hadrons is indeed around the binding energy [Formula: see text] of the heavy hadrons, which turns out to be in agreement with the expected one in the HQEFT. Therefore such a calculation provides a consistent check on the HQEFT and shows that the HQEFT is more reliable than the usual HQET for describing a slightly off-mass shell heavy quark within hadron as the usual HQET seems to lead to large 1/mQcorrections in evaluating the meson decay constants. It is emphasized that the introduction of the "dressed heavy quark" mass is useful for the heavy–light mesons (Qq) with [Formula: see text], while for heavy–heavy bound states (ψ1ψ2) with masses m1, [Formula: see text], like bottom-charm hadrons or similarly for muonium in QED, one needs to treat both particles as heavy effective particles via 1/m1and 1/m2expansions and redefine the effective bound states and modified "dressed heavy quark" masses within the HQEFT.

scholarly journals NONPERTURBATIVE HQET AT ORDER 1/m

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1661-1666
Author(s):  
B. BLOSSIER ◽  
G. VON HIPPEL ◽  
N. GARRON ◽  
T. MENDES
Keyword(s):  
Lattice Qcd ◽  
Heavy Quark ◽  
Effective Theory ◽  
Heavy Quark Effective Theory ◽  
Vector Mesons ◽  
Decay Constants ◽  
First Results ◽  
Pseudo Scalar

We summarize the first results for masses and decay constants of bottom-strange (pseudo-scalar and vector) mesons from nonperturbatively renormalized heavy-quark effective theory (HQET), using lattice-QCD simulations in the quenched approximation.

Mass level of heavy flavored hadrons in the heavy-quark effective theory

1993 ◽  
Vol 59 (1) ◽  
pp. 57-61 ◽  
Author(s):  
Toshiaki Ito ◽  
Toshiyuki Morii ◽  
Morimitsu Tanimoto
Keyword(s):  
Heavy Quark ◽  
Effective Theory ◽  
Heavy Quark Effective Theory ◽  
Mass Level

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

Baryon sum rules in the heavy quark effective theory

1993 ◽  
Vol 301 (2-3) ◽  
pp. 243-248 ◽  
Author(s):  
E. Bagan ◽  
M. Chabab ◽  
H.G. Dosch ◽  
S. Narison
Keyword(s):  
Heavy Quark ◽  
Sum Rules ◽  
Effective Theory ◽  
Heavy Quark Effective Theory

scholarly journals High-precisionfBsand heavy quark effective theory from relativistic lattice QCD

2012 ◽  
Vol 85 (3) ◽  
Author(s):  
C. McNeile ◽  
C. T. H. Davies ◽  
E. Follana ◽  
K. Hornbostel ◽  
G. P. Lepage ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Heavy Quark ◽  
Effective Theory ◽  
Heavy Quark Effective Theory
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