Speaker: Dr. Yang Li (李阳)

          Department of Physics and Astronomy, Iowa State University

Abstract:

    I report on the recent progresses in light-front Hamiltonian approach to non-perturbative quantum chromodynamics. As a concrete example, I present a recent study heavy quarkonium as relativistic bound states in a light-front quantized Hamiltonian formalism. The effective Hamiltonian is based on light-front holography. We use a recently proposed longitudinal confinement to complete the soft-wall holographic potential for the heavy flavors. The spin structure is generated from the one-gluon exchange interaction with a running coupling. Within the obtained light-cone wave functions, we compute the mass spectroscopy, decay constants and the r.m.s. radii. We also present a detailed study of the obtained light-front wave functions and use the wave functions to compute the light- cone distributions, specifically the distribution amplitudes and parton distribution functions. We also apply the wave function to diffractive vector meson production. I will also talk about efforts on  ab initio approaches to non-perturbative QCD, in particular, non-perturbative renormalization and a computational framework called basis light-front quantization.

物理系322，2017-05-23, 15:15PM