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This article reviews our current understanding of how the internal quark structure of a nucleon bound in nuclei differs from that of a free nucleon. We focus on the interpretation of measurements of the EMC effect for valence quarks, a…

Nuclear Experiment · Physics 2017-12-06 O. Hen , G. A. Miller , E. Piasetzky , L. B. Weinstein

Hidden-color configurations are a key prediction of QCD with important physical consequences. In this work we examine a QCD color-singlet configuration in nuclei formed by combining six scalar $[u d]$ diquarks in a strongly bound $\rm…

High Energy Physics - Phenomenology · Physics 2020-12-08 Jennifer Rittenhouse West , Stanley J. Brodsky , Guy F. de Teramond , Alfred S. Goldhaber , Ivan Schmidt

The deep inelastic scattering cross section for scattering from bound nucleons differs from that of free nucleons.This phenomena, first discovered 30 years ago, is known as the EMC effect and is still not fully understood. Recent analysis…

Nuclear Experiment · Physics 2015-06-11 E. Piasetzky , O. Hen , L. B. Weinstein

The atomic nucleus is made of protons and neutrons (nucleons), that are themselves composed of quarks and gluons. Understanding how the quark-gluon structure of a nucleon bound in an atomic nucleus is modified by the surrounding nucleons is…

The EMC effect in deuterium and helium-3 is studied using a convolution formalism that allows isolating the impact of high-momentum nucleons in short-ranged correlated (SRC) pairs. We assume that the modification of the structure function…

High Energy Physics - Phenomenology · Physics 2021-06-30 E. P. Segarra , J. R. Pybus , F. Hauenstein , D. W. Higinbotham , G. A. Miller , E. Piasetzky , A. Schmidt , M. Strikman , L. B. Weinstein , O. Hen

Background: The density of the nucleus has been important in explaining the nuclear dependence of the quark distributions, also known as the EMC effect, as well as the presence of highmomentum nucleons arising from short-range correlations…

Nuclear Experiment · Physics 2013-05-30 John Arrington , Aji Daniel , Donal Day , Nadia Fomin , Dave Gaskell , Patricia Solvignon

We overview the progress made in studies of EMC and short range correlation (SRC) effects with the special emphasis given to the recent observation of the correlation between the slope of the EMC ratio at Bjorken x<1 and the scale factor of…

Nuclear Theory · Physics 2015-06-11 Misak M Sargsian

We explore the EMC effect of gluons through heavy quark production in deep inelastic scattering (DIS) and the nucleon-nucleon short range correlation (SRC) from sub-threshold photoproduction of the $J/\psi$. Applying an effective field…

High Energy Physics - Phenomenology · Physics 2025-01-07 Wei Wang , Ji Xu , Xing-Hua Yang , Shuai Zhao

The observed correlation between the EMC effect and the contribution of short-range correlations (SRCs) in nuclei suggests that the modification of the quark distributions of bound protons and neutrons might occur within SRCs. This raises…

Nuclear Experiment · Physics 2019-07-31 J. Arrington , N. Fomin

The strong repulsive core of the nucleon-nucleon (NN) interaction at short distances prevents nucleons from becoming close to each other. This gives rise to high-momentum nucleons in the nucleus that cannot be explained in the context of…

Nuclear Experiment · Physics 2015-06-11 Nadia Fomin

The relation between the nuclear EMC effect and the nucleon-nucleon short-range correlation is a hot topic in high-energy nuclear physics, ever since a peculiar linear correlation between these two phenomena discovered. In this paper, the…

Nuclear Theory · Physics 2024-05-28 Na-Na Ma , Tao-Feng Wang , Rong Wang

Recent experimental studies have led to the suggestion that short-range correlations may be a major contributor to the nuclear EMC effect. This hypothesis requires that the structure function for nucleons involved in short-range…

High Energy Physics - Phenomenology · Physics 2024-03-22 Wanli Xing , Xuan-Gong Wang , Anthony W. Thomas

Weinstein, et. al [1] [PRL 106, 052301 (2011)] and Hen, et. al [2] [PRC 85, 047301 (2012)] observed a correlation between the EMC effect and the amount of short range correlated (SRC) pairs in nuclei which implies that quark distributions…

The relative contributions to the valence nuclear EMC effect in the deuteron arising from off-shell effects and Fermi motion are examined in models which include nuclear binding and off-shell effects. Contrary to expectations, the effect of…

High Energy Physics - Phenomenology · Physics 2021-01-04 X. G. Wang , A. W. Thomas , W. Melnitchouk

In this work, we focus on the possible linear relation between short-range correlations (SRCs) and the EMC effect for partons in nuclei. First, we test a linear relationship pertaining to gluons in bound nuclei; it is manifested as a…

High Energy Physics - Phenomenology · Physics 2026-01-21 Shu-Man Hu , Wei Wang , Ji Xu , Xing-Hua Yang , Shuai Zhao

High energy lepton scattering has been the primary tool for mapping out the quark distributions of nucleons and nuclei. Data on the proton and deuteron have shown that there is a fundamental connection between the low and high energy…

Nuclear Experiment · Physics 2014-11-18 J. Arrington , R. Ent , C. E. Keppel , J. Mammei , I. Niculescu

The CLAS collaboration at Jefferson Laboratory has compared nuclear parton distributions for a range of nuclear targets and found that the EMC effect measured in deep inelastic lepton-nucleus scattering has a strongly "isophobic" nature.…

High Energy Physics - Phenomenology · Physics 2020-04-22 Jennifer Rittenhouse West , Stanley J. Brodsky , Guy F. de Téramond , Iván Schmidt

In this paper, we examine the hypothesis that the nuclear EMC effect comes merely from the N-N SRC pairs inside the nucleus and that the properties of N-N SRC pair are universal among the various nuclei, using the conventional $x$-rescaling…

Nuclear Theory · Physics 2023-02-24 Rong Wang , Na-Na Ma , Tao-Feng Wang

We investigate dijet production from proton-nucleus collisions at the Large Hadron Collider (LHC) as a means for observing superfast quarks in nuclei with Bjorken $x>1$. Kinematically, superfast quarks can be identified through directly…

High Energy Physics - Phenomenology · Physics 2016-01-20 Adam J. Freese , Misak M. Sargsian , Mark I. Strikman

Valence-shell nucleon knock-out experiments, such as 12C(e,e'p)11B, measure less strength then is predicted by independent particle shell model calculations. The theoretical solution to this problem is to include the correlations between…

Nuclear Experiment · Physics 2015-05-20 Douglas W. Higinbotham
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