Exclusive decays ofχbJandηbinto two charmed mesons

2009/09/30 by R. S. Azevedo, Regina S. Azevedo, Bingwei Long +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.80.074026

published as Phys.Rev.D80:074026,2009 · 43 pages, 12 figures. Added reference for Sec. V

arxiv created 2009/10/06 · openalex publication_date 2009/10/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We develop a framework to study the exclusive two-body decays of bottomonium into two charmed mesons and apply it to study the decays of the C-even bottomonia. Using a sequence of effective field theories, we take advantage of the separation between the scales contributing to the decay processes, 2m_b\ensuremath≫m_c\ensuremath≫\ensuremathΛ_QCD. We prove that, at leading order in the EFT power counting, the decay rate factorizes into the convolution of two perturbative matching coefficients and three nonperturbative matrix elements, one for each hadron. We calculate the relations between the decay rate and nonperturbative bottomonium and D-meson matrix elements at leading order, with next-to-leading log resummation. The phenomenological implications of these relations are discussed.

Citations

• Review of Particle Physics
• An effective field theory for collinear and soft gluons: Heavy to light decays
• Effective-field theories for heavy quarkonium
• Potential NRQCD: an effective theory for heavy quarkonium
• QCD Factorization forB→ππDecays: Strong Phases andCPViolation in the Heavy Quark Limit
• B-meson distribution amplitude in QCD