scholarly journals QCD string in excited heavy-light mesons and heavy-quark hybrids

2016 ◽  
Vol 94 (11) ◽  
Author(s):  
Yu. S. Kalashnikova ◽  
A. V. Nefediev
Keyword(s):  
Heavy Quark ◽  
Light Mesons ◽  
Qcd String

scholarly journals QCD string in light-light and heavy-light mesons

2001 ◽  
Vol 64 (1) ◽  
Author(s):  
Yu. S. Kalashnikova ◽  
A. V. Nefediev ◽  
Yu. A. Simonov
Keyword(s):  
Light Mesons ◽  
Qcd String

scholarly journals Decay constants of heavy-light mesons in Bakamjian-Thomas heavy quark models

1998 ◽  
Vol 58 (11) ◽  
Author(s):  
V. Morénas ◽  
A. Le Yaouanc ◽  
L. Oliver ◽  
O. Pène ◽  
J.-C. Raynal
Keyword(s):  
Heavy Quark ◽  
Decay Constants ◽  
Light Mesons ◽  
Quark Models

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.

Spectrum of Heavy–Light Mesons in the QCD String Picture

2005 ◽  
Vol 68 (4) ◽  
pp. 650 ◽  
Author(s):  
Yu. S. Kalashnikova
Keyword(s):  
Light Mesons ◽  
Qcd String

scholarly journals B(s), D(s)→ π, K, η, ρ, K*, ω, ϕ TRANSITION FORM FACTORS AND DECAY RATES WITH EXTRACTION OF THE CKM PARAMETERS |Vub|, |Vcs|, |Vcd|

2006 ◽  
Vol 21 (30) ◽  
pp. 6125-6172 ◽  
Author(s):  
Y. L. WU ◽  
M. ZHONG ◽  
Y. B. ZUO
Keyword(s):  
Heavy Quark ◽  
Radiative Decay ◽  
Form Factors ◽  
Effective Field ◽  
Decay Rates ◽  
Light Meson ◽  
Meson Mass ◽  
Transition Form ◽  
Systematic Calculation ◽  
Light Mesons

A systematic calculation for the transition form factors of heavy to light mesons (B, Bs, D, Ds→ π, K, η, ρ, K*, ω, ϕ) is carried out by using light-cone sum rules in the framework of heavy quark effective field theory. The heavy quark symmetry at the leading order of 1/mQexpansion enables us to reduce the independent wave functions and establish interesting relations among form factors. Some relations hold for the whole region of momentum transfer. The meson distribution amplitudes up to twist-4 including the contributions from higher conformal spin partial waves and light meson mass corrections are considered. The CKM matrix elements |Vub|, |Vcs| and |Vcd| are extracted from some relatively well-measured decay channels. A detailed prediction for the branching ratios of heavy to light meson decays is then presented. The resulting predictions for the semileptonic and radiative decay rates of heavy to light mesons (B, Bs, D, Ds→ π, K, η, ρ, K*, ω, ϕ) are found to be compatible with the current experimental data and can be tested by more precise experiments at B-factory, LHCb, BEPCII and CLEOc.

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