TMDs: Towards a Synergy between Lattice QCD and Global Analysis

Session

Session III

21 Jun 2023, 14:00

Center for Frontiers in Nuclear Science, Stony Brook University

4. Accessing TMDs from single pion and kaon SIDIS with CLAS12

Dr Stefan Diehl (JLU Giessen and UCONN)

21/06/2023, 14:00

Semi inclusive deep inelastic scattering is a well established tool to study TMDs and fragmentation functions. With the CLAS12 detector at Jefferson Laboratory (JLab) precise, multidimensional measurements of cross sections and asymmetry observables become possible in the valence quark regime, for the first time.
As a first observable, the structure function ratio $F_{LU}^{\sin \varphi }/F_{UU}$...

19. A Better Angle on Hadron Transverse Momentum Distributions at the EIC

Johannes K. L. Michel (MIT CTP)

21/06/2023, 14:30

We propose an observable $q_{\ast }$ sensitive to transverse momentum dependence (TMD) in
$eN\to ehX$, with $q_{\ast }/E_N$ defined purely by lab-frame angles. In 3D measurements of confinement and hadronization this resolves the crippling issue of accurately reconstructing small transverse momentum $P_{hT}$. We prove factorization for $\mathrm{d}{\sigma }_h/\mathrm{d}{q}_{\ast }$ for $q_{\ast }\ll Q$ with...

22. Understanding TMD structure using jets

Kyle Lee (MIT)

21/06/2023, 15:00

In this talk, I will discuss how jets provide powerful new processes to understand both the TMD distributions and TMD fragmentation functions. In this talk, I will discuss three different processes involving jets that are useful to studying TMD functions at the EIC:

i) back-to-back production of e+jet

ii) TMD hadron distribution inside an inclusive jet production process

iii) TMD...

13. Transversity PDFs and GPDs from lattice QCD

Martha Constantinou (Temple University)

22/06/2023, 14:00

Generalized parton distributions (GPDs) are important quantities that characterize the 3-D structure of hadrons, and complement the information extracted from TMDs. They provide information about the partons’ momentum distribution and also on their distribution in position space. Most of the information from lattice QCD is on the Mellin moments of GPDs, namely form factors and their...

10. Transversely Polarized Distribution from Lattice QCD

Huey-Wen Lin (member@msu.edu;faculty@msu.edu;employee@msu.edu)

22/06/2023, 14:30

We report an ongoing analysis of the lattice-QCD calculation of the isovector quark transversity distribution of the proton at physical pion mass at lattice spacing 0.06~fm using large-momentum effective theory. We compare our results with previous lattice calculations and discuss potential synergies with global analysis.

23. Transversity PDF of the proton from lattice QCD with physical quark masses

Xiang Gao

22/06/2023, 15:00

The transversity PDFs, which describe the difference between probabilities to find a parton spin aligned and anti-aligned to the transversely polarized parent nucleon, is considerably less constrained from experiments due to their chiral-odd nature. Complementary information from lattice QCD is desired. In this talk, we report a calculation using a $N_f=2+1$ HISQ ensemble with physical-mass...