Choice of heavy baryon currents in QCD sum rules

Abstract

In this paper we investigate the effects due to the mixing of two interpolating currents for ground state baryons within the framework of Heavy Quark Effective Theory using the QCD sum rule approach. Both two-point and three-point sum rules, thus the mass, coupling constant and Isgur-Wise function sum rules are considered. It is interesting to contrast those results with each other. Based on the Isgur-Wise functions obtained in this paper, we also analyze the effects of current mixing to Lambda-type and and Sigma-type semi-leptonic decays Lambda_b-->Lambda_c\ell\barν, Σ_b-->Σ_c\ell\barνand Σ_b-->Σ^*_c\ell\barν. Decay widths corresponding to various mixing parameters are obtained and can be compared to the experimental data.

RevTeX4, 11 pages with 6 eps figures

References in corpus (22)

• Heavy Quark Symmetry
• Heavy baryons
• Heavy Baryon Transitions in a Relativistic Three-Quark Model
• Hadrons with Charm and Beauty
• The Baryon Isgur-Wise Function in the Large $N_c$ Limit
• QCD Sum Rule Analysis for the Λ_b to Λ_c Semileptonic Decay
• Baryonic currents and their correlators in the Heavy Quark Effective Theory
• Form Factors and Decay Rates for Heavy $\Lambda$ Semileptonic Decays from QCD Sum Rules
• The Isgur-Wise Function in Small Velocity Limit
• 1/m Corrections to Heavy Baryon Masses in the Heavy Quark Effective Theory Sum Rules
• QCD Sum Rules for Heavy Baryons at Next-to-Leading Order in alpha_s
• An Analysis of Diagonal and Non-diagonal QCD Sum Rules for Heavy Baryons at Next-to-Leading Order in α_S
• On the choice of heavy baryon currents in the relativistic three-quark model
• Improved analysis for the baryon masses to order Lambda_{QCD}/m_Q from QCD sum rules
• Two-loop Anomalous Dimensions of Heavy Baryon Currents in Heavy Quark Effective Theory
• QCD sum rule analysis of excited ${\Lambda }_c$ mass parameter
• New Universality of Baryon Isgur--Wise Form Factor in the Large $N_c$ limit
• On the $b-$ Quark Kinetic Energy in the ${\Lambda }_b$
• $SU(2N_f)\otimes O(3)$ light diquark symmetry and current-induced heavy baryon transition form factors
• Large $N_c$ Universality of The Baryon Isgur--Wise Form Factor: The Group Theoretical Approach
• Leading Isgur-Wise form factor of ${\Lambda }_b\to {\Lambda }_{c1}$ transition using QCD sum rules
• Exclusive-Inclusive Ratio of Semileptonic Lambda_b-Decays

Cited by in corpus (20)

• Heavy Baryons in a Quark Model
• A review of the open charm and open bottom systems
• Rare Decays of Λ_b->Λ+ γand Λ_b ->Λ+ l^{+} l^{-} in the Light-cone Sum Rules
• Heavy baryon spectroscopy in QCD
• Distribution Amplitudes of the Lambda_b Baryon in QCD
• Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p lepton anti-neutrino
• The semi-leptonic form factors of ${\Lambda }_b\to {\Lambda }_c$ and ${\Xi }_b\to {\Xi }_c$ in QCD sum rules
• Excited heavy baryon masses to order Lambda_{QCD}/m_Q from QCD sum rules
• Revisiting semileptonic decays of ${\Lambda }_{b(c)}$ supported by baryon spectroscopy
• Mass spectra of the heavy baryons Lambda_Q and Sigma_Q^(*) from QCD sum rules
• Improved analysis on the semi-leptonic decay ${\Lambda }_c\to \Lambda {\ell }^{+}\nu$ from QCD light-cone sum rules
• Note on the Slope Parameter of the Baryonic Λ_b to Λ_c Isgur-Wise Function
• Electromagnetic form factors of the $\Lambda$ and $\Sigma$ baryons in an alternative baryonic current approach
• Heavy flavor baryon spectra via QCD sum rules
• ${\Lambda }_b\to {\Lambda }_c$ Form Factors from QCD Light-Cone Sum Rules
• Light-cone QCD sum rule approach for the $\Xi$ baryon electromagnetic form factors and the semileptonic decay Xi_c->Xi e^+nu_e
• Semileptonic transition of ${\Sigma }_b$ to $\Sigma$ in Light Cone QCD Sum Rules
• Tree Level Semileptonic ${\Sigma }_b$ to Nucleon Decay in Light Cone QCD Sum Rules
• S-Wave Single Heavy Baryons with Spin-3/2 at Finite Temperature
• New results on the baryon decay Lambda_b -> Lambda_c ell nu in Heavy Quark Effective Theory