Confinement in Nuclei and the Expanding Proton

Abstract

High-precision knowledge of electromagnetic form factors of nuclei is a subject of much current experimental and theoretical activity in nuclear and atomic physics. Such precision mandates that effects of the non-zero spatial extent of the constituent nucleons be handled in a manner that goes beyond the usual impulse approximation. A series of simple, Poincare-invariant, composite-proton models that respect the Ward-Takahashi identity and in which quarks are confined are used to study the validity of this approximation. The result of all of the models is a general theorem showing that medium modification of proton structure must occur. Combining this result with lattice QCD calculations leads to a conclusion that a bound proton must be larger than a free one.

7 pages 2 figures. This version adds references and makes improvements

References in corpus (9)

• Light hadron spectroscopy using domain wall valence quarks on an Asqtad sea
• Defining the Proton Radius: a Unified Treatment
• Proton and neutron electromagnetic form factors from lattice QCD
• Nucleon form factors on a large volume lattice near the physical point in 2+1 flavor QCD
• Nucleon electromagnetic form factors using lattice simulations at the physical point
• Computing the nucleon charge and axial radii directly at $Q^2=0$ in lattice QCD
• On the dependence of the wave function of a bound nucleon on its momentum and the EMC effect
• Exposing Novel Quark and Gluon Effects in Nuclei
• Flavor-dependent EMC effect from a nucleon swelling model

Cited by in corpus (10)

• Probing short-range correlations in the deuteron via incoherent diffractive $J/\psi$ production with spectator tagging at the EIC
• Calibration of nuclear charge density distribution by back-propagation neural networks
• Short-Range Correlations and the Nuclear EMC Effect in Deuterium and Helium-3
• Light-Front Holography Model of the EMC Effect
• First Measurement of Near- and Sub-Threshold $J/\psi$ Photoproduction off Nuclei
• The neutron and proton mass radii from the vector meson photoproduction data on the deuterium target
• Discovery vs. Precision in Nuclear Physics- A Tale of Three Scales
• The European Muon Collaboration effect from short-range correlated nucleons in a nucleon swelling model
• Micro-cosmos model of a nucleon
• Clustering in hadrons and light nuclei from Lorentz boosted form factors