Studying Color Transparency through u-Channel π<sup>0</sup> Electroproduction off a Nuclear Target

ORAL

Abstract

The recent measurements of exclusive backward-angle meson electroproduction from Jefferson Lab hint at a new domain of applicability of the QCD collinear factorization framework in the special u-channel kinematics regime. As a signature of QCD degrees of freedom in nuclei, and as a co-requisite of reaching the factorization regime, Color Transparency is expected to manifest itself as an increase in nuclear transparency with increasing momentum transfer. With the most recent quasi-elastic C(e,e'p) data ruling out Color Transparency for this process up to Q2=14.2 GeV2, while π electroproduction data in the forward region indicate CT effects, looking for CT in u-channel kinematics, where a fast nucleon is produced, has became a topic of debate. In this presentation, we present an idea that will attempt to test color transparency using a u-channel π0 electroproduction process: A(e,e'p)π0.

*GH supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), SAPIN-2021-00026. WC partially supported by the National Science Foundation (NSF) under Award No. 2111442.

Publication: MDPI Physics Special Issue on the Jefferson Lab Color Transparency Workshop (2022) 451-461, arXiv: 2202.04470 [hep-ph], https://doi.org/10.3390/physics4020030

Presenters

  • Garth M Huber

    • Univ of Regina

Authors

  • Garth M Huber

    • Univ of Regina
  • Wenliang B Li

    • Stony Brook University
    • Center for Frontiers in Nuclear Science, Stony Brook University
  • Bernard Pire

    • CPHT, CNRS, Institut Polytechnique de Paris
  • Wim Cosyn

    • Florida International University