[Theory-seminars] Zheng-Yang Li via Theory-seminars <theory-seminars at jlab.org>

[Zheng-Yang Li]

Dear all,

On Monday, October 2nd, 2023, we will have two seminar.

The first CNF Seminar will be given by Peter Petreczky of Brookhaven National Lab at 11am EDT in Cebaf Center L102. Otherwise, Peter's seminar will also be provided virtually on the Zoom for Government link:

https://jlab-org.zoomgov.com/j/1601213226?pwd=dUNRdHgvMm45bDZXWWM2Y2JYenlWQT09<https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1601213226-3Fpwd-3DdUNRdHgvMm45bDZXWWM2Y2JYenlWQT09&d=DwMF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=VqTuHdztI1WEJtaX9L67lw&m=QgYG6k2ybq7FGEPH6N4qJbuCXzWARbJp43ov1fPxsIfYuLcXbJghzqw_a9_I03r3&s=ytoyqbVx9Fdrqj494Q-7KR2UTOpd9xZFw3pzMHMPNko&e=>
Join our Cloud HD Video Meeting<https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1601213226-3Fpwd-3DdUNRdHgvMm45bDZXWWM2Y2JYenlWQT09&d=DwMF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=VqTuHdztI1WEJtaX9L67lw&m=QgYG6k2ybq7FGEPH6N4qJbuCXzWARbJp43ov1fPxsIfYuLcXbJghzqw_a9_I03r3&s=ytoyqbVx9Fdrqj494Q-7KR2UTOpd9xZFw3pzMHMPNko&e=>
Zoom is the leader in modern enterprise video communications, with an easy, reliable cloud platform for video and audio conferencing, chat, and webinars across mobile, desktop, and room systems. Zoom Rooms is the original software-based conference room solution used around the world in board, conference, huddle, and training rooms, as well as executive offices and classrooms. Founded in 2011, Zoom helps businesses and organizations bring their teams together in a frictionless environment to get more done. Zoom is a publicly traded company headquartered in San Jose, CA.
urldefense.proofpoint.com




The second virtual seminar will be given by Anthony Grebe of FermiLab at 1pm EDT on the Zoom for Government link:

https://jlab-org.zoomgov.com/j/1610378154?pwd=VTVnbURPNEkzdEYrMjlZSTlmQWpKZz09
Join our Cloud HD Video Meeting<https://jlab-org.zoomgov.com/j/1610378154?pwd=VTVnbURPNEkzdEYrMjlZSTlmQWpKZz09>
Zoom is the leader in modern enterprise video communications, with an easy, reliable cloud platform for video and audio conferencing, chat, and webinars across mobile, desktop, and room systems. Zoom Rooms is the original software-based conference room solution used around the world in board, conference, huddle, and training rooms, as well as executive offices and classrooms. Founded in 2011, Zoom helps businesses and organizations bring their teams together in a frictionless environment to get more done. Zoom is a publicly traded company headquartered in San Jose, CA.
jlab-org.zoomgov.com






Please see below for the titles and abstracts.


Theory Seminar: Monday October 2nd, 11am EDT


Speaker: Peter Petreczky (Brookhaven National Lab)


Title: Lattice calculation of nucleon PDFs and GPDs using Large Momentum Effective Theory


Abstract: Lattice QCD results on quark PDFs and GPDs of the nucleon obtained within the Large Momentum Effective Theory (LaMET) with NLO and NNLO matching will be presented. I will discuss how different versions of LaMET, such as the quasi-PDF approach and the short distance factorization or the pseudo-PDF approach complement each other. Results on un-polarized quark distributions and quark transversity distribution will be shown. In addition I will discuss calculations of the higher moments of unpolarized quark GPDs based on short distance factorization.

===================================================================================


Theory Seminar: Monday October 2nd, 1pm EDT (virtual)


Speaker: Anthony Grebe (FermiLab)


Title: Computing the Pion Light-Cone Distribution Amplitude Using the Heavy-Quark Operator Product Expansion


Abstract: The light-cone distribution amplitude (LCDA) of the pion carries information about the momentum distribution of its quarks, which is an important input to various experiments.  The LCDA can be expanded in terms of its Mellin moments, which combined contain all information about the distribution amplitude.  I will present our calculation of the second Mellin moment using the heavy-quark operator product expansion (HOPE) method, giving a result in good agreement with complementary methods.  I will also discuss ongoing work to compute the more challenging fourth moment, as well as refinements to our second moment calculation.


See you on Monday.


Best regards,

Caroline, Joe, and Zheng-Yang

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/theory-seminars/attachments/20230929/8772029e/attachment-0001.html>