Color Transparency and the Proton Form Factor- Feynman Wins

Abstract

A recent experiment [{\bf Phys. Rev. Lett. 126,082301 (2021)}] used the $(e,e^{\prime }p)$ reaction on ${}^{12}$C to search for the effects of color transparency (the absence of final state interactions). Color transparency was said to be ruled out. The ability to observe the effects of color transparency depends on the ability of a putative point-like-configuration (PLC), formed in a high-momentum transfer coherent reaction, to escape the nucleus without expanding its size. We study the expansion aspect of color transparency using superconformal baryon-meson symmetry and light-front holographic QCD. A new formalism is obtained and used to analyze the recent experiment. The resulting conclusion is that effects of expansion would not be sufficiently significant in causing final state interactions to occur. Therefore we conclude that a PLC was not formed. This means that the Feynman mechanism involving virtual photon absorption on a single high momentum quark is responsible for high momentum electromagnetic form factor of the proton.

10 pages,4 figures

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Cited by in corpus (4)

• Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
• Measuring Recoiling Nucleons from the Nucleus with the Electron Ion Collider
• Searching for an Enhanced Signal of the onset of Color Transparency in Baryons with D(e,e'p)n scattering
• Onset of color transparency in holographic light-front QCD