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Modification of Quark-Gluon Distributions in Nuclei by Correlated Nucleons Pairs

28 Mar 2023, 09:40
20m
Auditorium (MSU Kellogg Center)

Auditorium

MSU Kellogg Center

Parallel talk WG1: Structure Functions and Parton Densities WG 1

Speaker

Andrew Denniston (MIT)

Description

Analyzing data from nuclear lepton Deep-Inelastic Scattering, Drell-Yan processes, and W and Z boson production, we show that factorizing nuclear structure into quasi-free nucleons and universally modified close-proximity Short Range Correlated (SRC) nucleon pairs allows us to fully describe the quark-gluon structure of nuclei down to very-low momentum fractions. This is the first combined extraction of the universal distribution of quarks and gluons inside SRC pairs, and the nucleus-specific fraction of nucleons in SRC pairs. The extracted SRC fractions are in good agreement with previous nuclear structure calculations and measurements. This extraction of nuclear structure information from quark-gluon distributions thus represents a significant development toward understanding the structure of nuclei in terms of their fundamental quark-gluon constituents. At the same time such obtained nuclear PDFs are in very good agreement with fits using conventional framework of global nuclear PDF analysis.

Submitted on behalf of a Collaboration? No

Primary authors

Aleksander Kusina Andrew Denniston (MIT) Prof. Fred Olness (Southern Methodist University (US)) Or Hen Tomas Jezo (WWU ITP)

Presentation materials