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

International audienceQuarks and gluons, the building blocks of protons and neutrons (nucleons), plays a crucial role in our understanding of the visible universe. The strong interaction that governs their distribution inside nucleons is also responsible for generating over 90% of the nucleon’s mass [1]. Inside atomic nuclei, the distribution of quarks and gluons differs from that of free nucleons, and the cause of this difference remains unclear [2]. Here we use a factorized nuclear structure model that incorporates individual nucleons and pairs of correlated nucleons [3, 4] to accurately describe world data on quark and gluon distribution inside nuclei from measurements of lepton Deep-Inelastic Scattering, Drell-Yan processes, and high-mass W and Z boson production. Our analysis simultaneously extracts the universal effective distribution of quarks and gluons inside correlated nucleon pairs, as well as the nucleus-specific fractions of such correlated pairs. The correlation fractions are in good agreement with previous nuclear structure calculations [5] and measurements [3, 6–8]. This study thus presents a successful extraction of nuclear structure properties from quark-gluon level observables, marking significant advancement in our understanding of the fundamental structure of nuclei and, consequently, of visible matter in the universe

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

International audienceQuarks and gluons, the building blocks of protons and neutrons (nucleons), plays a crucial role in our understanding of the visible universe. The strong interaction that governs their distribution inside nucleons is also responsible for generating over 90% of the nucleon’s mass [1]. Inside atomic nuclei, the distribution of quarks and gluons differs from that of free nucleons, and the cause of this difference remains unclear [2]. Here we use a factorized nuclear structure model that incorporates individual nucleons and pairs of correlated nucleons [3, 4] to accurately describe world data on quark and gluon distribution inside nuclei from measurements of lepton Deep-Inelastic Scattering, Drell-Yan processes, and high-mass W and Z boson production. Our analysis simultaneously extracts the universal effective distribution of quarks and gluons inside correlated nucleon pairs, as well as the nucleus-specific fractions of such correlated pairs. The correlation fractions are in good agreement with previous nuclear structure calculations [5] and measurements [3, 6–8]. This study thus presents a successful extraction of nuclear structure properties from quark-gluon level observables, marking significant advancement in our understanding of the fundamental structure of nuclei and, consequently, of visible matter in the universe

Evidence for Modified Quark-Gluon Distributions in Nuclei by Correlated Nucleon Pairs

International audienceWe 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 fractions. Such successful extraction of these universal distributions marks a significant advance in our understanding of nuclear structure properties connecting nucleon- and parton-level quantities

Evidence for Modified Quark-Gluon Distributions in Nuclei by Correlated Nucleon Pairs

International audienceWe 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 fractions. Such successful extraction of these universal distributions marks a significant advance in our understanding of nuclear structure properties connecting nucleon- and parton-level quantities