2016/03/31 by Jie Zhu, Hong-Wei Ke, Zheng-Tao Wei · 2 citations
Mathematics · Physics and Astronomy · #Algorithm #Baryon #Black Holes and Theoretical Physics #Branching fraction #Combinatorics #Diquark #Factorization #Hadron #Lambda #Mathematics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Tree (set theory) #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-016-4134-5
12 pages, 1 figure, published version
openalex publication_date 2016/05/01 · arxiv created 2016/05/09 · arxiv updated 2016/06/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
With only the tree-level operator, the decay of Λ b→ pK is predicted to be one order smaller than the experimental data. The QCD penguin effects should be taken into account. In this paper, we explore the one-loop QCD corrections to the decay of Λ b→ pK within the framework of QCD factorization approach. For the baryon system, the diquark approximation is adopted. The transition hadronic matrix elements between Λ b and p are calculated in the light-front quark model. The branching ratio of Λ b→ pK is predicted to be about 4.85× 10-6 , which is consistent with experimental data (4.9± 0.9)× 10-6 . The CP violation is about 5 % in theory.