Dynamical Nucleon-Pion System via Basis Light-Front Quantization Approach
报告题目： Dynamical Nucleon-Pion System via Basis Light-Front Quantization Approach
报告人：Mr. Weijie Du
Graduate student, Iowa State University
We present the first application of the Basis Light-Front Quantization method to a simple chiral model of the nucleon-pion system as a relativistic bound state for the physical proton. The light-front mass-squared matrix of the nucleon-pion system is obtained within a truncated basis. The mass and the corresponding light-front wave function (LFWF) of the proton are computed by numerical diagonalization of the resulting mass-squared matrix. With the boost invariant LFWF, we evaluate the proton’s parton distribution function and Dirac form factor. An improved model is implemented to calculate the proton’s Dirac form factor. The resulting proton’s Dirac form factor agrees well with the experimental data below the squared transverse momentum transfer of 0.20 GeV2.