HQEFT as A Large Component QCD and Comments on The Incompleteness of HQET

Abstract

The Heavy quark effective field theory (HQEFT) is revisited in a more intuitive way. It is shown that HQEFT is a consistent large component QCD of heavy quarks. In the non-relativistic limit, HQEFT recovers the non-relativistic QCD (NRQCD). The resulting new effects in the HQEFT of QCD are carefully reexamined. It is then natural to come to the comments on the usual heavy quark effective theory (HQET). Consistent phenomenological applications of HQEFT exhibit its interesting features and completeness in comparison with HQET. It then becomes manifest why we shall base on the HQEFT of QCD rather than HQET which is an incomplete one for computing 1/m_Q corrections. More precise extraction for |V_{cb}| and |V_{ub}| in the HQEFT of QCD is emphasized.

11 pages, revtex, published version

References in corpus (7)

• Weak Matrix Elements and |V_cb| in New Formulation of Heavy Quark Effective Field Theory
• A Consistent Calculation of Heavy Meson Decay Constants and Transition Wave Functions in the Complete HQEFT
• B --> rho l nu Decay and |V_{ub}|
• Exclusive B-meson Rare Decays and General Relations of Form Factors in Effective Field Theory of Heavy Quarks
• A heavy quark effective field lagrangian keeping particle and antiparticle mixed sectors
• Power scaling rules for charmonia production and HQEFT
• Extended HQEFT Lagrangian and currents

Cited by in corpus (7)

• $B_{(s)},D_{(s)}\to \pi ,K,\eta ,\rho ,K^{\ast },\omega ,\varphi$ Transition Form Factors and Decay Rates with Extraction of the CKM parameters $|V_{ub}|$, $|V_{cs}|$, $|V_{cd}|$
• Large Component QCD and Theoretical Framework of Heavy Quark Effective Field Theory
• $B_{(s)}\to D_{(s)}^{\ast \ast }$ form factors in HQEFT and model independent analysis of relevant semileptonic decays with NP effects
• A More Precise Extraction of |V_{cb}| in HQEFT of QCD
• Lifetime Difference and Endpoint effect in the Inclusive Bottom Hadron Decays
• Heavy Quark Expansion in 1/\hat{m}_Q and |V_{cb}| Extraction
• Spin Polarisability of the Nucleon in the Heavy Baryon Effective Field Theory