Quark-Exchange Mechanism of $\gamma d\to np$ Reaction At 2-6 GeV

Abstract

Within the constituent quark model, we examine the extent to which the deuteron photo-disintegration at 2-6 GeV can be described by the quark-exchange mechanism. With the parameters constrained by the $np$ scattering, the calculated differential cross sections disagree with the data in both magnitude and energy-dependence. The results can be improved if we use a smaller size parameter for quark wavefunctions. We also find that the on-shell approximation used in a previous investigation is not accurate

arXiv commentTo be published in the Proceeeding of Second Asia Pacific Conference on Few-Body Problems in Physics, Shanghai, China, August 27-30, 2002

References in corpus (5)

• QCD Rescattering and High Energy Two-Body Photodisintegration of the Deuteron
• A Realistic Description of Nucleon-Nucleon and Hyperon-Nucleon Interactions in the SU_6 Quark Model
• Mean field exponents and small quark masses
• Dynamical Test of Constituent Quark Models with $\pi N$ Reactions
• Photodisintegration of the deuteron in the few GeV region using asymptotic amplitudes

Cited by in corpus (5)

• Transition between nuclear and quark-gluon descriptions of hadrons and light nuclei
• Complete Angular Distribution Measurements of Two-Body Deuteron Photodisintegration between 0.5 and 3 GeV
• Angular dependence of recoil proton polarization in high-energy γd \to p n
• Forward-backward angle asymmetry and polarization observables in high-energy deuteron photodisintegration
• Determination of the Beam-Spin Asymmetry of Deuteron Photodisintegration in the Energy Region $E_{\gamma }=1.1-2.3$ GeV