Chiral symmetry and exclusive B decays in the SCET

2005/01/31 by Benjamı́n Grinstein, Benjamin Grinstein, Dan Pirjol · 14 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Boson #Chiral perturbation theory #Formalism (music) #Goldstone boson #Hadron #Helicity #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/j.physletb.2005.04.024

published in Physics Letters B 615(3-4), 213-220 (Elsevier BV) · 6 pages, 1 figure; typos corrected

arxiv created 2005/02/16 · openalex publication_date 2005/04/21 · arxiv updated 2010/04/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We construct a chiral formalism for processes involving both energetic hadrons and soft Goldstone bosons, which extends the application of soft-collinear effective theory to multibody B decays. The nonfactorizable helicity amplitudes for heavy meson decays into multibody final states satisfy symmetry relations analogous to the large energy form factor relations, which are broken at leading order in Λ/mb by calculable factorizable terms. We use the chiral effective theory to compute the leading corrections to these symmetry relations in B→Mnπℓν¯ and B→Mnπℓ+ℓ− decays, with one energetic meson Mn and one soft pion.

Citations

• Chiral perturbation theory for and
• Factorization and the soft overlap contribution to heavy-to-light form factors
• Comment on quark masses in SCET
• B→M1M2: Factorization, charming penguins, strong phases, and polarization
• An effective field theory for collinear and soft gluons: Heavy to light decays
• Time-dependent CP violation in B0→P0P0X0 decays
• Rare radiative exclusiveBdecays in soft-collinear effective theory
• Symmetry-breaking corrections to heavy-to-light B meson form factors at large recoil
• Testing factorization inB→D(*)Xdecays