How well do we understand the proton?
演講者 : Wen-Chen Chang 章文箴 Research Fellow (Institute of Physics, Academia Sinica)
演講地點 : 理學教學新大樓物理系1F 36102教室
演講時間 : 2022 / 09 / 30 14:10
The proton is a spin-1/2 particle, discovered as a basic constituent of atomic nuclei by Rutherford in 1917. It and its isospin partner, neutron, carry the majority of visible mass in our universe. Starting from Gell-Mann's quark model, the substructures of protons have been explored mostly by the deep-inelastic scattering and Drell-Yan process for more than five decades. In this talk, I will focus on what we know about the partonic structures of the proton, and how its mass and spin can be understood by their interesting dynamics resulting from the strong interaction. The ongoing experiments and future U.S. Electron-Ion Collider will be introduced.