Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session 2WCA: Polarized Drell-Yan Physics at Fermilab IInvited Workshop
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Chair: Ievgen Lavrukhin, University of Michigan Room: Hilton Waikoloa Village Kings 3 |
Sunday, November 26, 2023 2:00PM - 2:30PM |
2WCA.00001: Current status of TMD structure functions and their connections to the collinear twist-3 functions Invited Speaker: Shinsuke Yoshida The origin of the single transverse-spin asymmetry(SSA) has been a mystery in high energy hadron physics since the first observation in the late 1970s. Transverse-momentum-dependent(TMD) factorization and the collinear twist-3 factorization are known as successful perturbative QCD frameworks in describing the data of the SSA. Although these frameworks basically have different applicable regions, there is the intermediate region where both frameworks are available. The relationship between the frameworks is important for the unified description of the origin of the SSA in the full kinematic region. There are two major sources of the SSA, Sivers effect and Collins effect. Sivers effect has drawn attention also in the context of the proton spin structure because it describes the correlation between the spin and the orbital motion of partons inside the proton. In this talk, I will review the current status of our understanding about the nonperturbative TMD functions and the relationship to the collinear twist-3 functions. |
Sunday, November 26, 2023 2:30PM - 3:00PM |
2WCA.00002: Sivers functions: a status report Invited Speaker: Zhongbo Kang Exploring transverse momentum dependent parton distribution functions (TMD PDFs) has been one of the major research topics in hadron physics in recent years. TMD PDFs provide three-dimensional (3D) imaging of the nucleon in both the longitudinal and transverse momentum space. Sivers function is one of the most studied TMD PDFs in the community. It describes the distribution of unpolarized partons inside a transversely polarized nucleon, through a correlation between the transverse spin of the nucleon and the transverse momentum of the parton with respect to the nucleon's moving direction. In this talk, we will provide the latest development in the field in the global anaysis of the Sivers function from various processes, as well as the predictions for the polarized Drell-Yan process at the Fermilab. |
Sunday, November 26, 2023 3:00PM - 3:30PM |
2WCA.00003: Drell-Yan program at Fermilab and beyond Invited Speaker: Wolfgang B Lorenzon Polarized Drell-Yan scattering has become a major focus in the hadronic physics community, motivated by the fundamental prediction of QCD that postulates that a time-reversal-odd distribution function, such as the Sivers function, measured in Drell-Yan must have the opposite sign when measured with semi-inclusive DIS. The big attraction for a polarized Drell-Yan program at the Fermilab Main Injector is the combination of high luminosity, large x-coverage and highly polarized targets that makes Fermilab arguably the best place to measure single-spin asymmetries in polarized Drell-Yan scattering with high precision. I will discuss plans for polarized Drell-Yan experiments at Fermilab and compare them with measurements at other laboratories around the world. |
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