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

Details Quark-Exchange Mechanism of $γd \to np$ Reaction At 2-6 GeV Quark-Exchange Mechanism of $γd \to np$ Reaction At 2-6 GeV

2002-10-28

arxiv.org/abs/nucl-th/0210082v1

Mod.Phys.Lett. A18 (2003) 200-207

Physics

Nuclear Physics

Nuclear Theory

To be published in the Proceeeding of Second Asia Pacific Conference on Few-Body Problems in Physics, Shanghai, China, August

Scientific paper

10.1142/S0217732303010247

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

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