[Theory-seminars] Cake Seminar Tomorrow - Colin Egerer

[Caroline Costa]

Hello All,

Tomorrow, February 28th at 1:00PM we will have our next (virtual) cake seminar, given by Colin Egerer on https://jlab-org.zoomgov.com/j/1611179843?pwd=M09CNTFpbFVZSW1IQlhIMGp3RUVHUT09

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Please see below for the details of Colin's talk.

Cake Seminar
Monday, February 28th, 1:00PM
Colin Egerer (JLab) will speak about "Resolving PDFs & GPDs of the Nucleon from Lattice QCD
"

Abstract:
A wealth of information concerning the structure of the nucleon has been garnered from the Drell-Yan (DY) and Deep Inelastic Scattering (DIS) processes. Whereas the kinematic coverage of world data from which unpolarized Parton Distribution Functions (PDFs) are extracted is rich, the spin-dependent PDFs are less constrained, making them ideal non-perturbative quantities to study from first-principles.

In this talk I will summarize recent efforts of the HadStruc Collaboration to map out the leading-twist quark PDFs of the nucleon using Lattice QCD. This effort hinges on the computation of matrix elements of space-like parton bilinears, which factorize, akin to the QCD collinear factorization of hadronic cross sections, in a short-distance regime into the desired PDFs - ideas codified within the pseudo-distribution formalism. Our results showcase the novel use of the distillation spatial smearing kernel, which has yielded matrix elements of sufficient statistical quality such that both the PDFs and various systematic effects are simultaneously quantified.

Extension of pseudo-distributions to the off-forward regime, wherein Generalized Parton Distributions (GPDs) arise, will also be discussed. As GPDs depend not only on the parton momentum fraction, but also skewness and momentum transfer, the kinematic phase space necessary to resolve these distributions, with minimal bias, is considerably larger when compared to PDFs. This paradigm is found to be especially well-suited for realization with distillation, affording a timely research direction broadly supportive of both JLab and EIC science, as well as the nuclear physics community at large.

See you tomorrow!
Caroline & Patrick

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