19.08.15 14:15

Flavor structure of the nucleon sea from lattice QCD

Jiunn-Wei Chen (National Taiwan University)

I will present the first direct lattice calculation of the isovector sea-quark distributions in the nucleon within the framework of the large-momentum effective field theory proposed recently. We use Nf = 2+1+1 highly improved staggered quarks lattice gauge ensembles (generated by the MILC Collaboration) and clover valence fermions with pion mass 310 MeV. We establish the convergence of the result as the nucleon momentum increases within the uncertainty of the calculation. Although the lattice systematics are not yet fully under control, we obtain some qualitative features of the flavor structure of the nucleon sea leading to the violation of the Gottfried sum rule. I will also briefly mention some of my recent works on other topics.

 

(Seminarraum II; please not unusual time!)

Kategorie: Kernphysik