Light-cone QCD sum rules for the semileptonic decayΛb→plν¯

2004/01/31 by Ming-Qiu Huang, D. Wang, Dao-Wei Wang · 1 citation
Mathematics · Physics and Astronomy · #Algorithm #Bar (unit) #Baryon #Cone (formal languages) #High-Energy Particle Collisions Research #Lambda #Lepton #Light cone #Mathematics #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #QCD sum rules #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Semileptonic decay #Sum rule in quantum mechanics #hep-ph

paper · pdf · doi:10.1103/physrevd.69.094003

published as Phys.Rev. D69 (2004) 094003 · RevTeX 4, formulas about distribution amplitudes and some misprints corrected, minor changes in numerical results, conclusions unchanged, publication version

arxiv created 2004/03/22 · openalex publication_date 2004/05/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The exclusive semileptonic heavy baryon decay \ensuremathΛ_b\ensuremath→pl\ensuremathν is investigated using the light-cone sum rule method in both full QCD and heavy quark effective theory (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 is typically one order smaller. Both results are consistent with the experimental upper limit and can be compared to refined experimental data in the future.

Citations

• Light-cone heavy quark effective theory sum rules for theB→πtransition with1/mQcorrections
• Excited heavy baryon masses to orderΛQCD/mQfrom QCD sum rules
• Soft contribution to the pion form factor from light-cone QCD sum rules
• Improved light-cone sum rules for the electromagnetic form factors of the nucleon
• Baryonic currents and their correlators in the heavy quark effective theory
• Calculations in external fields in quantum chromodynamics. Technical review
• Improved analysis for the baryon masses to orderΛQCD/mQfrom QCD sum rules
• Improved analysis of B → πeν from QCD sum rules on the light-cone
• Heavy baryon transitions in a relativistic three-quark model
• ScalarB→πandD→πform factors in QCD
• Review of particle properties
• Review of Particle Physics

Cited by

• Higher order light-cone distribution amplitudes of the Lambda baryon