Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprx10002s&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
The recent experiments on high energy two-body photodisintegration of the deuteron set a new stage in high energy nuclear physics. The calculations using the conventional mesonic picture of nuclear interactions failed to describe the qualitative features of these measurements. Our analysis demonstrated that at the photon energies larger than 2-2.5GeV the relevant degrees of freedom in the reaction is the quarks rather then nucleons and mesons. We are discussing an approach in which the photon absorption by a quark in one nucleon followed by its high momentum transfer interaction with a quark in the other may produce two final-state nucleons with high relative momentum. Within this rescattering model we calculated the absolute values of the cross section of high energy photodisintegration of the deuteron. We obtained reasonable agreement with the data for photon energies larger than 2-2.5GeV and c.m. scattering angle at 90 deg. In this report we present our study of recoil polarization effects in high-energy photodisintegration reactions. We demonstrate that within quark-rescattering model one can naturally explain the small values of transverse polarization in the processes of deuteron photodisintegration recently obtained at JLAB experiment. We will also discuss the predictions for different polarization observables which would be measured at upcoming JLAB experiments.
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