Internal structure of light mesons using the power law wave function
Published in Modern Physics Letters A (Special Issue). Study of pion and kaon structure using spin-improved power-law wave functions.
S. Puhan, N. Kumar, and H. Dahiya
Mod. Phys. Lett. A (2026)
April 08, 2026
Abstract
We study the internal structure of the pion and kaon using spin-improved power-law wave functions within the light-front framework. Key results include: Distribution Amplitudes (DAs) evolved using LO ERBL equations (pion DA symmetric, consistent with the asymptotic result 6x(1-x)); Generalized Parton Distributions (GPDs) at zero skewness; T-even leading-twist unpolarized TMDs f1(x,k⊥²); NLO DGLAP-evolved PDFs at Q² = 16 GeV² (only 41% longitudinal momentum carried by quarks); charge form factors in good agreement with NA7, FNAL, and JLab data; charge radii r_π = 0.668 fm and r_K = 0.704 fm; decay constants of pion (114 MeV) and kaon (144 MeV).
Summary
Comprehensive study of pion and kaon structure using spin-improved power-law LFWFs. Presents DAs, PDFs, TMDs, GPDs, and form factors with ERBL and NLO DGLAP evolution, in good agreement with experimental data.
Authors: S. Puhan, N. Kumar, and H. Dahiya
Published in: Mod. Phys. Lett. A (2026), World Scientific — Special Issue (Guest Editor: Dr. Parada Hutauruk)