Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p lepton anti-neutrino

Abstract

The exclusive semileptonic heavy baryon decay Λ_b\to p l\barνis investigated using light-cone sum rule method in both full QCD and HQET. The form factors describing the decay are calculated and used to predict the decay width and differential distribution. The total decay width obtained from full QCD is in agreement with the previous theoretical predictions while the HQET result are typically one order smaller. Both results are consistent with the experimental upper limit and can be compared to the refined experimental data in the future.

RevTeX 4, formulas about distribution amplitudes and some misprints corrected, minor changes in numerical results, conclusions unchanged, publication version

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• The Nucleon Distribution Amplitudes and their application to nucleon form factors and the $N\to \Delta$ transition at intermediate values of $Q^2$
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• Semileptonic ${\Lambda }_{b,c}$ to Nucleon Transitions in Full QCD at Light Cone
• Improved analysis on the semi-leptonic decay ${\Lambda }_c\to \Lambda {\ell }^{+}\nu$ from QCD light-cone sum rules
• ${\Lambda }_b\to p$ transition form factors in perturbative QCD
• Light-cone Distribution Amplitudes of Xi and their Applications
• Deep Inelastic Pion Electroproduction at Threshold
• Electromagnetic form factors of the $\Lambda$ and $\Sigma$ baryons in an alternative baryonic current approach
• Axial form-factor and induced pseudoscalar form-factor of the nucleons
• Light Cone QCD Sum Rules Analysis of the Axial N -> Delta Transition Form Factors
• Nucleon Form Factors to Next-to-Leading Order with Light-Cone Sum Rules
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• Light-cone QCD Sum Rules for the $\Lambda$ Baryon Electromagnetic Form Factors and its magnetic moment
• ${\Lambda }_c$ Semileptonic Decays in a Quark Model
• The exclusive rare decay b->s gamma of heavy b-Baryons
• Higher order light-cone distribution amplitudes of the Lambda baryon
• Scalar form-factor of the proton with light-cone QCD sum rules
• Nucleon form factors induced by isovector and isoscalar axial-vector currents in QCD
• Semileptonic transition of ${\Sigma }_b$ to $\Sigma$ in Light Cone QCD Sum Rules
• Recent Developments on the CKM Matrix
• Scalar form factor of the nucleon and nucleon--scalar meson coupling constant in QCD
• The decays ${\Lambda }_{b,c}\to N^{\ast }l\nu$ in QCD
• Semileptonic Decay of ${\Omega }_c^0\to {\Xi }^{-}{l}^{+}{\nu }_l$ From Light-Cone Sum Rules
• Higher Order Corrections to the Light-cone Distribution Amplitudes of the Sigma baryon
• Semileptonic Decay of ${\Xi }_c\to \Xi {\ell }^{+}{\nu }_{\ell }$ From Light-Cone QCD Sum Rules
• Semileptonic decay of double strangeness heavy flavor baryons