Nuclear Physics Seminars

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https://virginia.zoom.us/j/3993936949


Tuesday, May 25, 2021
3:30 PM
Online, Room via Zoom
Note special room.

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"N3LO extraction of the Sivers function from SIDIS, Drell-Yan, and W/Z boson production data"


Alexey Prokudin , Penn State University
[Host: Dustin Keller]
ABSTRACT:

I will talk about a global fit of the available polarized Semi-Inclusive Deep Inelastic Scattering (SIDIS), polarized pion-induced Drell-Yan (DY) and W/Z boson production data at N3LO and NNLO accuracy of the Transverse Momentum Dependent (TMD) evolution, and extraction of the Sivers function for u,d,s and and for sea quarks. The Qiu-Sterman function is determined in a model independent way via the operator product expansion from the extracted Sivers function. I will also show the study of the applicability region, the impact of the unpolarized distributions' uncertainties, the universality of the Sivers functions, positivity constraints, the significance of the sign-change relation, and provide the comparison with the existing extractions.

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