The Spring 2015 JLab Hall A Deeply Virtual Compton Scattering Run

ORAL

Abstract

The Jefferson Lab Hall A Deeply Virtual Compton Scattering (DVCS) experiment E12-06-114 will take data at 8 and 10 GeV in Spring 2015. This experiment will measure absolute cross sections of the H$(\vec{e},e'\gamma)p$ and H$(\vec{e},e'\pi^0)p$ reactions. The Spring run will complete $Q^2$ scans at $x_{Bj} = 0.36$ and $0.50$. The $Q^2$-dependent cross sections allow the separation of the leading-twist Generalized Parton Distribution (GPD) amplitude from the higher-twist scaling-violating terms. The GPDs encode the transverse spatial distribution of partons as a function of longitudinal momentum. We will present preliminary results from the Spring run and projections for the complete experiment.

Authors

  • S. Lee Allison

    Old Dominion University