Conveners
Parallel II: Parallel II
- Adam Freese (Jefferson Lab)
Parallel II: Parallel II
- Marco Zaccheddu (Jefferson Lab)
Parallel II: Parallel II
- Fatma Aslan (JLab)
Parallel II: Parallel II
- Eric Moffat (Argonne National Lab)
Parallel II: Parallel II
- Jia-Yue Zhang (Jefferson Lab)
Parallel II: Parallel II
- Patrick Barry (Argonne National Lab)
Parallel II: Parallel II
- Daniel Adamiak (Ohio State University)
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Fatma Aslan (JLab)5/19/25, 2:00 PM
We use the GUMP (Generalized Parton Distributions (GPDs) through Universal Moment Parametrization) framework, based on the conformal moments of GPDs, to perform a unified global analysis incorporating Deeply Virtual Compton Scattering (DVCS) and Deeply Virtual Meson Production (DVMP) data. By performing simultaneous fits across these processes and incorporating Next-to-Leading Order (NLO)...
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Kemal Tezgin5/19/25, 2:30 PM
In this talk, I will present an impact study of pseudo-data from the future Electron-Ion Collider (EIC) on nucleon tomography and Compton Form Factors (CFFs), based on detector simulations performed with the EICROOT package. The pseudo-data are generated using the EpIC Monte Carlo event generator, a flexible and modular framework for simulating a broad range of exclusive processes, including...
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Panjsheeri Zaki5/19/25, 3:00 PM
Generalized parton distributions (GPDs) serve as indispensable tools in filling in the gaps of the angular momentum sum rules as well as mapping the partonic spatial structure of hadrons. In this work, we extend the utility of GPDs in mapping the proton’s spatial structure beyond the typical one-body partonic picture, obtainable through Fourier transformations of GPDs to impact parameter...
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Eric Moffat (Argonne National Lab)5/19/25, 4:00 PM
I will present recent progress on the extraction of GPDs from data utilizing machine learning.
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Brandon Kriesten (Argonne National Lab)5/19/25, 4:30 PM
Inverse problems are ubiquitous in hadron structure and tomography, where accurately characterizing uncertainties is crucial for unraveling new physics hiding within these uncertainties. In this new precision era of QCD, it is vital to create a translation between our physics and next generation AI/ML algorithms, using tools such as evidential deep learning and information-theoretic metrics to...
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Matteo Cerutti (Hampton University and Jefferson Lab)5/20/25, 2:00 PM
The understanding of the three-dimensional internal structure of the proton has significantly been developed over the past few decades. In particular, the extraction of Transverse Momentum Dependent distributions (TMDs) from global fits of experimental data has now reached an impressive level of precision. In this talk, I will present first indications of flavor dependence emerging from the...
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Marco Zaccheddu (Jefferson Lab)5/20/25, 2:30 PM
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Leonard Gamberg (Penn State Berks)5/20/25, 3:30 PM
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Alessia Bongallino (Universidad del País Vasco UPV/EHU)5/20/25, 4:00 PM
In this talk I present a new determination of the unpolarised fragmentation functions (FFs) for Lambda production from single-inclusive e+e- annihilation, semi-inclusive deep-inelastic scattering and pp collisions data. The analysis is done at both next-to-leading order (NLO) and next-to-next-to-leading order (NNLO). We extract the unpolarised FFs defining a parametrisation in terms of a...
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Yixin Zhang (Shandong University)5/20/25, 4:30 PM
Study of the origin of transverse single-spin asymmetries has triggered the development of the twist-3 formalism and the transverse-momentum-dependent parton distribution functions (TMDs). Measurement of the azimuthal distribution of identified hadrons within a jet in transversely polarized hadronic interactions provides an opportunity to study the TMD physics in the final state, {\it i.e.},...
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Charles Joseph Naїm (Stony Brook University (CFNS))5/22/25, 2:00 PM
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Etienne Bianco5/22/25, 2:30 PM
We study dijet production in pA collisions at forward rapidities at next-to-eikonal accuracy. We restrict ourselves to the next-to-eikonal corrections that are induced by the quark background field of the target. Computing the scattering amplitudes, for all possible channels, in the back-to-back limit allows the study of leading twist quark TMDs in the high energy limit. We indeed express the...
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Oleh Fedkevych (Georgia State University)5/22/25, 3:00 PM
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Daniel Adamiak (Ohio State University)5/22/25, 4:00 PM
We apply the valence quark model to constrain the non-perturbative initial condition for the small-x helicity evolution. The remaining free parameters are constrained by performing a global analysis to the available polarized small-x deep inelastic scattering data. A good description of the world data is obtained with only 8 free parameters. The model parameters are tightly constrained by the...
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Yushan Su (UMD)5/22/25, 4:30 PM
Parton distribution functions (PDFs) at large $x$ are challenging to extract from experimental data, yet they are essential for understanding hadron structure and searching for new physics beyond the Standard Model. Within the framework of the large momentum $P^z$ expansion of lattice quasi-PDFs, we investigate large $x$ PDFs, where the matching coefficient is factorized into the hard kernel,...
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Carl Carlson (William & Mary)5/23/25, 2:00 PM
When electrons strike a proton or nuclear target, there is a regime where electroproduction of the highest momentum pion or rho mesons proceeds by a perturbatively calculable process. The process is not the leading twist fragmentation process but rather a higher twist process that produces kinematically isolated mesons. Our calculations demonstrate, that in conditions that can be expected at...
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Andrei Afanasev (GWU)5/23/25, 2:30 PM
Calculations of the QED corrections to semi-inclusive deep-inelastic scattering (SIDIS) are crucial for studies of the 3D structure of the nucleon at JLab and future Electron Ion Collider (EIC). Previously, the important role of two-photon exchange (TPE) was discovered for the studies of nucleon structure in elastic electron-proton scattering. Here, we address the role of TPE corrections on...
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Shaswat Tiwari (North Carolina State University)5/23/25, 3:00 PM
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Singh Ravi
We compute the contribution of the quark and gluon component of the energy-momentum tensor (EMT) to the angular momentum density in various decompositions. We use the light-front Hamiltonian technique, and a two-component formalism in light-front gauge, where the constrained degrees of freedom are eliminated. Instead of a nucleon, we consider a simple composite spin-1/2 state, namely a quark...
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Filippo Delcarro (University of Pavia)
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Sudeep Saha
My work focuses on trying to understand the mechanical properties of nucleons, such as mass, angular momentum, pressure, and shear force distribution, in terms of their quark and gluon constituents. In this work, we calculate the pressure and shear force distributions using the matrix elements of the energy-momentum tensor, which can be parametrized in terms of gravitational form factors. We...
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