2010/11/17 by Xiaohui Liu · 33 citations
Mathematics · Physics and Astronomy · #Effective field theory #Factorization #Hadron #High-Energy Particle Collisions Research #Jet (fluid) #Logarithm #Mathematical physics #Mathematics #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Renormalization group #hep-ph
paper · pdf · doi:10.1016/j.physletb.2011.03.055
published in Physics Letters B 699(1-2), 87-92 (Elsevier BV) · 13 pages, 4 figures
arxiv created 2010/11/17 · openalex publication_date 2011/04/10 · arxiv updated 2015/05/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this work we study the QCD corrections to the top quark doubly decay rate with a detected B hadron containing a b quark. We focus on the regime among which the emitted W boson nearly carries its maximum energy. The tool that we use here is the soft-collinear effective theory (SCET). The factorization theorem based on SCET indicates a novel fragmenting jet function. We calculate this function to next-to-leading order in αs. Large logarithms due to several well separated scales are summed up using the renormalization group equation (RGE). Finally we reach an analytic formula for the distribution which could easily be generalized to other heavy hadron decays.