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Large component QCD and theoretical framework of heavy quark effective field theory
Wu, Yue-Liang; Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
2006
发表期刊INTERNATIONAL JOURNAL OF MODERN PHYSICS A
ISSN0217-751X
卷号21期号:28-29页码:5743-5792
摘要Based on a large component QCD derived directly from full QCD by integrating over the small components of quark fields with vertical bar p vertical bar < E + m(Q), an alternative quantization procedure is adopted to establish a basic theoretical framework of heavy quark effective field theory (HQEFT) in the sense of effective quantum field theory. The procedure concerns quantum generators of Poincare group, Hilbert and Fock space, anticommutations and velocity superselection rule, propagator and Feynman rules, finite mass corrections, trivialization of gluon couplings and renormalization of Wilson loop. The Lorentz invariance and discrete symmetries in HQEFT are explicitly illustrated. Some new symmetries in the infinite mass limit are discussed. Weak transition matrix elements and masses of hadrons in HQEFT are well defined to display a manifest spin-flavor symmetry and 1/m(Q) corrections. A simple trace formulation approach is explicitly demonstrated by using LSZ reduction formula in HQEFT, and shown to be very useful for parametrizing the transition form factors via 1/m(Q) expansion. As the heavy quark and antiquark fields in HQEFT are treated on the same footing in a fully symmetric way, the quark-antiquark coupling terms naturally appear and play important roles for simplifying the structure of transition matrix elements, and for understanding the introduction of "dressed heavy quark"-hadron duality. In the case that the "longitudinal" and "transverse" residual momenta of heavy quark are at the same order of power counting, HQEFT provides a consistent approach for systematically analyzing heavy quark expansion in terms of 1/m(Q). Some interesting features in applications of HQEFT to heavy hadron systems are briefly outlined.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Cb-vertical-bar Bottom Hadron Decays V-ub Form-factors Matrix-elements Hqeft Mesons Renormalization Transitions Constants
学科领域Physics
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收录类别SCI
WOS记录号WOS:000243202400003
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5854
专题理论物理所SCI论文
通讯作者Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
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Wu, Yue-Liang,Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China. Large component QCD and theoretical framework of heavy quark effective field theory[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2006,21(28-29):5743-5792.
APA Wu, Yue-Liang,&Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.(2006).Large component QCD and theoretical framework of heavy quark effective field theory.INTERNATIONAL JOURNAL OF MODERN PHYSICS A,21(28-29),5743-5792.
MLA Wu, Yue-Liang,et al."Large component QCD and theoretical framework of heavy quark effective field theory".INTERNATIONAL JOURNAL OF MODERN PHYSICS A 21.28-29(2006):5743-5792.
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