Luigi Del Debbio [ HET - Seminar ] "Euclidean Observables for Pdf determinations"

Thursday 15 Jul 2021, 11:00 → 12:00 US/Eastern

https://bnl.zoomgov.com/j/1616949369?pwd=dXJzMnlDS0ZPWDJvM0Zyb2ppbjc0UT09

Julia Gehrlein, Luigi Del Debbio (University of Edinburgh), Peter Boyle (BNL), Sally Dawson (BNL)

Euclidean Observables for Pdf determinations

Following the seminal work by Ji on quasi-PDF, there has been a momentous activity in lattice QCD to extract parton distribution functions (PDFs) from Monte Carlo data. 

In this talk I will review the connection between observables that are computed in Euclidean space and the universal PDFs that are only defined in Minkovski space-time. The talk will focus on the case of a scalar field theory, where unnecessary technical complications can be avoided while the physical content can be highlighted. I will also discuss how to include lattice data in the global NNPDF fitting procedure and show some first results. If time permits I will comment more generally on a Bayesian approach to inverse problems.