[Theory-seminars] Cake Seminar Wednesday

[Joseph Karpie]

Hey everyone,

On Wednesday at 1pm in F326-327, we will have a cake seminar by Wally Melnitchouk.

Title: "New JAM global QCD analysis of pion and kaon PDFs"

Abstract I will review recent results from the JAM Collaboration on pion and kaon parton distribution functions (PDFs) obtained from global QCD analysis of experimental Drell-Yan and leading neutron electroproduction data, together with lattice QCD calculations of PDF moments and Ioffe time distributions. The analysis indicates a softer valence up-quark distribution in the K+ compared with the π+, and provides the first empirical evidence for significantly different valence up and anti-strange densities in the kaon. Inclusion of recent lattice calculations of gluonic pseudo Ioffe-time distributions also significantly reduces uncertainties on the gluon PDF, revealing a higher gluon density in the pion at large momentum fractions than in the proton.


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Joe Karpie
Pronouns: He/His/Him
Postdoctoral Fellow
Theoretical and Computational Physics Center
Jefferson Lab

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