Parton Distributions and Lattice Calculations (PDFLattice 2024)

Session

Session 3

18 Nov 2024, 13:30

JLab

Conveners

Session 3

• Aurore Courtoy (Instituto de Física, UNAM)

9. Uncertainty quantification in lattice determinations of unpolarised PDFs

Christopher Monahan

18/11/2024, 13:30

Talk

The extraction of unpolarised parton distribution functions (PDFs) from lattice quantum chromodynamics (QCD) is now a mature enterprise. Significant theoretical and computational advances over the last decade have enabled calculations that quantify or estimate all systematic uncertainties. Entering the industrial era of precision lattice calculations will require a clear understanding of...

39. Discussion

18/11/2024, 14:00

26. Proton PDF Uncertainties at NNLO from a Markov chain Monte Carlo Investigation

Peter Risse

18/11/2024, 14:10

Talk

The current scientific standard in PDF uncertainty estimation relies either on repeated fits over artificially generated data to arrive at Monte Carlo samples of best fits or on the Hessian method, which uses a quadratic expansion of the figure of merit, the $\chi^2$-function. Markov chain Monte Carlo methods allows one to access the uncertainties of PDFs without making use of quadratic...

12. Mixture Models for uncertainty quanitification in PDFs

Kirtimaan Ajaykant Mohan

18/11/2024, 14:30

Talk

Parton distribution functions (PDFs) form an essential part of particle physics calculations. Currently, the most precise predictions for these non-perturbative functions are generated through fits to global data. A problem that several PDF fitting groups encounter is the presence of tension in data sets that appear to pull the fits in different directions. In other words, the best fit depends...

2. The Resolution of Proton Imaging

Dr Daniel Adamiak (Jefferson Lab)

18/11/2024, 14:50

One of the goals of modern nuclear physics is to capture a picture of the inside of a proton. The distribution of the positions and momenta of quarks inside the proton are described through quantum correlation functions (QCFs). These QCFs cannot be directly measured but inferred through modeling and fitting to data from particle collider experiments. Our confidence and uncertainty in these...

40. Discussion

18/11/2024, 15:10