Speaker
Dr
Yibo Yang
(University of Kentucky)
Description
Higgs boson provides the source of the fundamental particle mass. But how it is related to the proton mass and then the mass of the observable matters, is an interesting, important, and yet unanswered question. The total masses of the three valence quark in the proton are less than 10 MeV which is directly related to the Higgs boson, while the total proton mass is 938MeV. It is clear that the question can only be answered by solving QCD nonperturbatively, and/or with information from the experiment.
I will report the progress on the proton mass decomposition based on the energy momentum tensor of QCD. We made the calculations with the chiral fermion on several 2+1 flavor domain wall fermion sea configurations which have different lattice spacing, volume and several values of the sea quark masses including the physical value. The results are matched to that on the MS-bar scheme at 2GeV with 1-loop perturbative calculation.
Primary author
Dr
Yibo Yang
(University of Kentucky)
Co-authors
Prof.
Keh-Fei Liu
(University of Kentucky)
Prof.
Ying Chen
(Institute of High Energy Physics, CAS)
