Title: Tackling Continuum Strong QCD

Speaker: Prof. Craig D. Roberts （Argonne National Laboratory） 　 

Time: 10:00AM, July 26th (Thursday)

Place: Theory Division，319

Abstract: QCD's Dyson-Schwinger equations (DSEs) provide a quantitative tool for studying nonperturbative phenomena in the continuum. Following confirmation of their prediction of dynamical chiral symmetry breaking via numerical simulations of lattice-QCD, greater credence has been accorded to DSE predictions for a wide range of observable phenomena. The speaker will provide an overview which details a variety of such predictions, ranging from hadron form factors to parton distribution functions and amplitudes, and also explains that quarks are not Dirac particles; gluons are nonperturbatively massive; Goldstone’s theorem is fundamentally an expression of equivalence between the one-body problem and the two-body problem in the pseudoscalar channel; and confinement is a dynamical phenomenon which cannot veraciously be expressed via a potential.