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Rescattering effects in the reaction γd → π-pp.

Vyacheslav Gauzshtein1,2, Eed Darwish3,4, Darya Efimenko5

  • 1Budker Institute of Nuclear Physics, Novosibirsk, Russia, 630090. V.V.Gauzshteyn@inp.nsk.su.

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Summary
This summary is machine-generated.

Researchers measured the tensor analyzing power in the deuteron photodisintegration reaction. Accounting for final-state interactions significantly improved agreement between experimental data and theoretical models.

Keywords:
Few-body systemsForces inhadronic systems and effective interactionsPhotonuclear reactionsPolarization phenomena in reactionsSpin observables

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Area of Science:

  • Nuclear Physics
  • Particle Physics

Background:

  • Deuteron photodisintegration is a fundamental process for understanding nuclear forces.
  • Experimental data on the tensor analyzing power provides crucial insights into nucleon-nucleon interactions.

Purpose of the Study:

  • To experimentally determine the tensor analyzing power (t20) in the deuteron photodisintegration reaction (γd → np).
  • To compare experimental results with theoretical models, specifically a spectator model incorporating final-state interactions.

Main Methods:

  • Data collected at the Budker Institute of Nuclear Physics using tagged photons and an internal tensor-polarized deuterium target.
  • Measurement of the [Formula: see text] reaction in the photon energy range of 400–650 MeV.
  • Extraction of [Formula: see text] from yield asymmetry measurements upon reversal of deuteron tensor polarization.

Main Results:

  • Experimental data for the tensor analyzing power [Formula: see text] were obtained for the [Formula: see text] reaction.
  • Comparison with statistical simulations showed that including final-state interactions significantly improves agreement with the experimental data.
  • The results provide a stringent test for theoretical models of few-nucleon systems.

Conclusions:

  • The study successfully measured the tensor analyzing power in deuteron photodisintegration.
  • The importance of final-state interactions in theoretical models was confirmed.
  • The findings contribute to a deeper understanding of the dynamics in the two-nucleon system.