<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Production by Polarized Photons in the Resonance Region
J. Alspector(Massachusetts Institute of Technology), Donald Jensen Fox(Massachusetts Institute of Technology), D. Luckey(Massachusetts Institute of Technology), Charles A. Nelson(Massachusetts Institute of Technology), L.S. Osborne(Massachusetts Institute of Technology), G. Tarnopolsky(Massachusetts Institute of Technology), Z. Bar‐Yam(Southeastern University), J. de Pagter(Massachusetts Institute of Technology), J. Dowd(Southeastern University), W. Kern(Massachusetts Institute of Technology), S. M. Matin(Massachusetts Institute of Technology)
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Abstract
We have measured the cross sections at 90\ifmmode^\circ\else\textdegree\fi{} c.m. for ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ and ${\ensuremath{\pi}}^{0}$ photoproduction with polarized photons. The photon energies ranged from 0.8 to 2.2 GeV. We compare the resonant "bumps" in the cross section with theoretical models. The measured asymmetry agrees with a quark-model calculation though the predicted cross sections are low.
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