Online Archive of University of Virginia Scholarship
Ruling Out the Onset of Color Transparency up to Q<sup>2</sup>=14.2 GeV<sup>2</sup> in Quasielastic <sup>12</sup>C(e,e’p) Scattering441 views
Author
Matter, John, Physics - Graduate School of Arts and Sciences, University of Virginia
Advisors
Liyanage, Nilanga, AS-Physics, University of Virginia
Abstract
Color Transparency (CT) is a prediction of QCD that at high momentum transfer Q^2, a system of quarks which would normally interact strongly with nuclear matter could form a small color-neutral object whose compact transverse size would be maintained for some distance, passing through the nucleus undisturbed. A clear signature of CT would be a dramatic rise in nuclear transparency T with increasing Q^2. CT emerges as a deviation from Glauber multiple scattering theory, which predicts constant T. While a rise in nuclear transparency would provide an unequivocal validation of QCD factorization theorems, the complex nature of nuclear interactions renders its observation difficult to predict. The E12-06-107 experiment at JLab measured T in quasielastic electron-proton scattering with carbon-12 and liquid hydrogen targets, for Q^2 between 8.0 and 14.2 GeV^2, a range over which models of CT predicted that T might differ appreciably from Glauber calculations. Supported in part by US DOE grant DE-FG02-03ER41240.
Matter, John. Ruling Out the Onset of Color Transparency up to Q<sup>2</sup>=14.2 GeV<sup>2</sup> in Quasielastic <sup>12</sup>C(e,e’p) Scattering. University of Virginia, Physics - Graduate School of Arts and Sciences, PHD (Doctor of Philosophy), 2021-08-06, https://doi.org/10.18130/fk6r-ma55.
