1. Open Access Kent State
  2. Polarization Measurements in High-Energy Deuteron Photodisintegration
Author(s)
Abstract

We present measurements of the recoil proton polarization for the d(γ⃗,p⃗)n reaction at θc.m. = 90° for photon energies up to 2.4 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. The induced polarization py vanishes above 1 GeV, contrary to meson-baryon model expectations, in which resonances lead to large polarizations. However, the polarization transfer Cx does not vanish above 1 GeV, inconsistent with hadron helicity conservation. Thus, we show that the scaling behavior observed in the d(γ,p)n cross sections is not a result of perturbative QCD. These data should provide important tests of new nonperturbative calculations in the intermediate energy regime.
Format
Article
Identifier(s)
10.1103/PhysRevLett.86.2975
Publication Date
2001-04-02
Publication Title
Physical Review Letters
Volume
86
Issue
14
First Page
2975
Last Page
2979
Keywords
Subject
Community
Department of Biological Sciences
Comments

Copyright 2001 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.86.2975.
Permalink https://oaks.kent.edu/bscipubs/1
Wijesooriya, K., Kooijman, E., & Jefferson Lab Hall A Collaboration. (2001). Polarization Measurements in High-Energy Deuteron Photodisintegration. Physical Review Letters. https://doi.org/10.1103/PhysRevLett.86.2975
Wijesooriya, K., Edgar Kooijman, and Jefferson Lab Hall A Collaboration. 2001. “Polarization Measurements in High-Energy Deuteron Photodisintegration”. Physical Review Letters. https://doi.org/10.1103/PhysRevLett.86.2975.
Wijesooriya, K., E. Kooijman, and Jefferson Lab Hall A Collaboration. Polarization Measurements in High-Energy Deuteron Photodisintegration. Physical Review Letters, 2 Apr. 2001, doi:10.1103/PhysRevLett.86.2975.