Theory Seminar - Dimitra Pefkou

On Monday, March 17, at 1 p.m., Dimitra Pefkou of University of California, Berkeley, will present "Moments of Parton Distribution Functions From Lattice QCD" in CEBAF Center rm. L102 and via Zoom.

We kindly ask all attendees to provide their full name when entering the event. If attendees have questions for the speaker, please introduce yourself before asking the question.

Abstract: The parton distribution functions (PDFs) are crucial to the understanding of the internal structure of hadrons, and their precise determination is necessary for searches of beyond the Standard Model physics in collider experiments. Directly accessing PDFs in Lattice QCD calculations is impossible due to the Euclidean space-time geometry. Mellin moments of PDFs are defined in terms of local operators that can be computed in lattice QCD, but suffer from power divergent mixing beyond a certain order due to the reduced symmetry of the hypercubic lattice. Recently, a method was proposed [1] to use gradient flow in order to circumvent this mixing and access moments of PDFs of any order. In this talk, I will discuss the implementation of this method, and present preliminary results on moments of the unpolarized isovector PDF of the pion using four stabilized Wilson fermion ensembles generated by the OpenLat initiative [2].

[1] A. Shindler 2311.18704[2] https://openlat1.gitlab.io