2006/08/31 by Zhi-Gang Wang, Z. G. Wang, Shaolong Wan +1 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-007-0249-z
published as Eur.Phys.J.C50:781-791,2007 · 22 pages, 16 figures, revised version, to appear in Eur. Phys. J. C
arxiv created 2007/02/09 · openalex publication_date 2007/03/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this article, we calculate the vector form factors f+Kπ(Q2) and f-Kπ(Q2) within the framework of the light-cone QCD sum rules approach. The numerical values of the f+Kπ(Q2) are compatible with the existing theoretical calculations, the central value of the f+Kπ(0), f+Kπ(0)=0.97, is in excellent agreement with the values from the chiral perturbation theory and lattice QCD. The values of the |f-Kπ(0)| are very large comparing with the theoretical calculations and experimental data, and can not give any reliable predictions. At large momentum transfers with Q2> 5GeV2, the form factors f+Kπ(Q2) and |f-Kπ(Q2)| can either take up the asymptotic behavior of (1)/(Q2) or decrease more quickly than (1)/(Q2), more experimental data are needed to select the ideal sum rules.