2002/08/17 by Zuohong Li, Zuo-Hong Li, Li, Zuo-Hong +4
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0208167
Latex, 15 pages, 2 figures. To appear in JPG
arxiv created 2002/08/17 · openalex publication_date 2002/08/17 · arxiv updated 2009/11/30 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
The radiative decay Bq^*→ Bqγ(q=u,d, or s) is reexamined with a modified light-cone QCD sum rule method, in which adequate chiral operators are chosen as the interpolating fields in the correlators used for a sum rule estimate of the relevant coupling g_Bq^*Bqγ . The resulting sum rules not only show the physical picture consistent with the underlying physics in Bq^*→ Bqγ but also avoid the pollution by the nonlocal matrix element < γ(q) | q(x) γμγ5q(0) | 0>, which starts with twist-3 and thus may bring a large uncertainty to the sum rule predictions. Also, a comparison is made with the previous results from light-cone QCD sum rules and chiral perturbation theory.