2003/05/03 by Mohammad Ahmady, M. R. Ahmady, C. S. Kim +2 · 9 citations
Mathematics · Physics and Astronomy · #Algorithm #Baryon #Branching fraction #Charm (quantum number) #Factorization #Hadron #High-Energy Particle Collisions Research #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #hep-ph
paper · pdf · doi:10.1016/j.physletb.2004.07.048
published in Physics Letters B 598(3-4), 203-210 (Elsevier BV) · 16 pages, ReVTeX, 5 eps figures
arxiv created 2003/05/03 · openalex publication_date 2004/08/27 · arxiv updated 2009/11/30 · openalex created_date 2016/08/23 · openalex updated_date 2026/08/05
We calculate the branching ratios of the hadronic Λb decays to η and η′ in the factorization approximation where the form factors are estimated via QCD sum rules and the pole model. Our results indicate that, contrary to B→Kη(′) decays, the branching ratios for Λb→Λη and Λb→Λη′ are more or less the same in the hadronic Λb transitions. We find that the anomaly contribution is crucial in Λb→Λη(′) decays. We obtain the branching ratio of Λb→Λη(′) to be 11.47(11.33)×10−6 in QCD sum rules, and 2.95(3.24)×10−6 in the pole model. We also consider the contribution of the charm content in the η′ production in Λb→Λ transition.