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CTEQ Fall meeting 2024

21โ€“22 Nov 2024
Christopher Newport University
America/New_York timezone

Jennifer Major

Session

Public Session

21 Nov 2024, 09:00
Trible Library Theater (Christopher Newport University)

Trible Library Theater

Christopher Newport University

1 Avenue of the Arts, Newport News, VA 23606, USA

Description

Extra non-structured time for discussions and follow-up chats.

Presentation materials

There are no materials yet.

  1. 46. Welcome by Dr. Quentin Kidd, CNU Provost and Executive Vice President
    21/11/2024, 09:00
  2. 57. Workshop overview
    Alberto Accardi (Christopher Newport U. and Jefferson Lab)
    21/11/2024, 09:15
  3. 29. Automated studies of PDF parametrizations
    Aurore Courtoy (Instituto de Fรญsica, UNAM)
    21/11/2024, 09:30

    We present a methodology to automate the generation of polynomial shapes for parton distribution functions (PDFs). Our recent studies demonstrate that the freedom in parametrization choice contributes a large part of PDF uncertainties. Using Bรฉzier curves, we construct error bands for pion PDFs as a demonstration of a general approach that can be applied in other types of global analyses....

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  4. 27. Jets in DIS: Present and Future
    Miguel Arratia Munoz
    21/11/2024, 10:00

    I will provide an overview of recent jet measurements in DIS using data from the H1 experiment at HERA. Renewed interest, triggered by the upcoming EIC, has once again brought jet physics in DIS to the forefront of research. I will highlight how novel observables, algorithms, and theoretical frameworks developed in recent years have been tested against precise DIS data. Additionally, I will...

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  5. 47. QCD opportunities at JLab with 12 GeV positrons and 22 GeV Electrons
    Cynthia (Thia) Keppel
    21/11/2024, 11:00
  6. 28. Towards a parton shower with next-to-leading order splitting functions
    Prof. Davison Soper (University of Oregon)
    21/11/2024, 11:30

    Parton shower event generators are based on approximations to what can be called a quantum parton shower evolution equation. The "quantum" designation indicates that the quantum nature of color and spin are incorporated. The splitting functions for this kind of shower evolution are currently known only to first order in the strong coupling. I will describe work to extend this to second order...

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  7. 31. Evidence for Modified Quark-Gluon Distributions in Nuclei by Correlated Nucleon Pairs
    Prof. Fred Olness (Southern Methodist University (US))
    21/11/2024, 12:00

    We extend the QCD Parton Model analysis using a factorized nuclear structure model incorporating individual nucleons and pairs of correlated nucleons. Our analysis of high-energy data from lepton Deep-Inelastic Scattering, Drell-Yan and W/Z production simultaneously extracts the universal effective distribution of quarks and gluons inside correlated nucleon pairs, and their nucleus-specific...

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  8. 48. Discussion
    21/11/2024, 12:20
  9. 49. Alpha strong determination with JLab experimental data
    Alexandre Deur (Jefferson Lab)
    21/11/2024, 14:00
  10. 38. Extraction of Parton Structure including Lattice QCD
    Dr Joseph Karpie (JLab)
    21/11/2024, 14:30

    QCD is a difficult theory of hadrons because it is described entirely unobservable partons, the quarks and gluons. In order to access parton distributions, hadronic observables such as experimental cross sections or lattice QCD matrix elements must have factorization approximations separated hadronic and partonic distance scales. These observables are sensitive to different regimes in momentum...

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  11. 34. Collins-Soper kernel from collinear factorization
    Matteo Cerutti (Christopher Newport University and Jefferson Lab)
    21/11/2024, 14:50

    Inclusive DIS at large Bjorken is revisited to highlight the importance of tracking off-lightcone effects in the proof of factorization theorems, even collinear ones. In DIS at threshold, in particular, the relevant physics develops around two opposite light-cone directions just like in TMD SIDIS, and the Collins Soper kernel emerges as a universal function in the rapidity evolution of the...

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  12. 50. Discussion
    21/11/2024, 15:10
  13. 30. GMVFN scheme implementations with Subtraction and Residual PDFs for processes at hadron colliders
    Marco Guzzi (Kennesaw State University)
    21/11/2024, 16:00

    We discuss the application of ACOT-like general mass
    variable flavor number (GMVFN) schemes to proton-proton collisions with particular attention to the production of final states with at least one heavy quark. Subtraction and residual heavy-quark parton distribution functions are introduced to facilitate the implementation of this scheme at higher orders in perturbative QCD.

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  14. 33. Fast NNLO Implementation of the approximate ACOT scheme for DIS
    Peter Risse
    21/11/2024, 16:30

    Mass-dependent quark contributions are of great importance to DIS processes. The simplified-ACOT-$\chi$ scheme includes these effects over a wide range of momentum transfers up to next-to-leading order in QCD. In recent years an improvement in the case of neutral current DIS has been achieved by using zero-mass contributions up to next-to-next-to-leading order (NNLO) with massive phase-space...

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  15. 43. News from the CTEQ-TEA global analysis
    Prof. Pavel Nadolsky (Southern Methodist University/Michigan State University)
    21/11/2024, 16:50

    I summarize the recent progress on the global PDF analysis for protons and pions from the CTEQ-TEA group, with the main focus on the results published in arXiv:2408.04020.

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  16. 51. Discussion
    21/11/2024, 17:10
  17. 52. PVDIS investigations with SoLID detector
    Michael Nycz (University of Virginia)
    22/11/2024, 09:00
  18. 36. Impact of parity-violating deep-inelastic scattering on the nucleon strangeness and weak mixing angle
    Richard Whitehill
    22/11/2024, 09:20

    At present, there is a lack of experimental data constraining the dependence of the strange nucleon parton distribution functions (PDFs) on the parton momentum fraction and the electroweak mixing angle at low-$Q^2$. The parity-violating asymmetry from the neutral-current deep inelastic scattering of electrons from proton and deuterium targets, which will be measured by the proposed SoLID...

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  19. 58. Pixelizing Quantum-Correlation Functions: A Novel Approach for Hadron Structure Studies
    Marco Zaccheddu (Jefferson Lab)
    22/11/2024, 09:40

    In this talk, we introduce a new approach for parameterizing Quantum-Correlation Functions (QCFs). By treating QCFs as multidimensional images or tensors, we propose a pixel-based representation. This novel perspective offers a versatile framework for analyzing and manipulating QCFs, enabling us to leverage a wide range of image processing techniques.

    We will demonstrate the effectiveness...

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  20. 45. New Measurements of the Deuteron to Proton F2 Structure Function Ratio at Hall C, Jefferson Lab
    Debaditya Biswas (Virginia Tech)
    22/11/2024, 10:00

    Nucleon structure functions, measured in lepton-nucleon scattering, are key to understanding partonic dynamics. At high parton momenta, extracting parton distributions becomes challenging due to non-perturbative effects and limited precision data. Neutron structure and d-quark distributions are particularly difficult to extract due to nuclear corrections required for deuteron-based...

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  21. 54. Discussion
    22/11/2024, 10:20
  22. 55. Systematic uncertainties from the implementation of higher twists in QCD analyses
    Sanghwa Park (Jefferson Lab)
    22/11/2024, 11:00
  23. 32. Uncertainty quantification with discrepant data sets
    Kirtimaan Ajaykant Mohan
    22/11/2024, 11:20

    I will discuss different models of uncertainty quantification when different data sets of a fit disagree and are discrepant. Specifically I will review three different models including the use of the Gaussian Mixture Model to determine uncertainties.

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  24. 44. Systematic uncertainties in PDF fits
    Prof. Pavel Nadolsky (Southern Methodist University/Michigan State University)
    22/11/2024, 11:40

    We will discuss some aspects of the interpretation of systematic uncertainties in global PDF analyses

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  25. 56. Discussion
    22/11/2024, 12:10
  26. 53. Pixelization of partonic functions in JAM framework
    Marco Zaccheddu (Jefferson Lab)
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