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Wang, WY; Wu, YL; Wang, WY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
A consistent calculation of heavy meson decay constants and transition wave functions ln the complete HQEFT
Source PublicationINTERNATIONAL JOURNAL OF MODERN PHYSICS A
KeywordQuark Effective Theory Qcd
AbstractWithin the complete heavy quark effective field theory (HQEFT), the QCD sum rule approach is used to evaluate the decay constants including 1/m(Q) corrections and the Isgur-Wise function and other additional important wave functions concerned at 1/m(Q) for 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/m(Q) corrections to the scaling law f(M) similar to F/root M-m are found to be small in HQEFT, which demonstrates again the validity of 1/m(Q) expansion 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 A 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/m(Q) corrections 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 m(Q) much greater than <()over bar> much greater than m(q), while for heavy-heavy bound states (psi (1)psi (2)) With masses m(1), m(2) much greater than <()over bar>, like bottom-charm hadrons or similarly for muonium in QED, one needs to treat both particles as heavy effective particles via 1/m(1) and 1/m(2) expansions and redefine the effective bound states and modified "dressed heavy quark" masses within the HQEFT.
2001
ISSN0217-751X
Volume16Issue:3Pages:377-408
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/12825
Collection理论物理所科研产出_SCI论文
Corresponding AuthorWang, WY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Wang, WY,Wu, YL,Wang, WY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.. A consistent calculation of heavy meson decay constants and transition wave functions ln the complete HQEFT[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2001,16(3):377-408.
APA Wang, WY,Wu, YL,&Wang, WY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2001).A consistent calculation of heavy meson decay constants and transition wave functions ln the complete HQEFT.INTERNATIONAL JOURNAL OF MODERN PHYSICS A,16(3),377-408.
MLA Wang, WY,et al."A consistent calculation of heavy meson decay constants and transition wave functions ln the complete HQEFT".INTERNATIONAL JOURNAL OF MODERN PHYSICS A 16.3(2001):377-408.
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