APS » PROLA » Phys. Rev. C » Volume 66 » Issue 3

Phys. Rev. C 66, 034614 (2002) [14 pages]

Polarization measurements in neutral pion photoproduction
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K. Wijesooriya et al.
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Received 9 May 2002; published 26 September 2002

We present measurements of the recoil proton polarization for the 1H(γ→,p→)π0 reaction for θc.m.π=60°–135° and for photon energies up to 4.1 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. Various theoretical models are compared with the results. No evidence for hadron helicity conservation is observed. Models that employ factorization are not favored. It appears from the strong angular dependence of the induced polarization at photon energies of 2.5 and 3.1 GeV that a relatively high spin resonance or background amplitude might exist in this energy region.


©2002 The American Physical Society

URL: http://link.aps.org/abstract/PRC/v66/e034614
DOI: 10.1103/PhysRevC.66.034614
PACS: 13.60.Le, 24.70.+s, 24.85.+p, 25.20.Lj

* Corresponding author. Email address: krishniw@jlab.org
† Present address: St. Mary’s University, Halifax, Nova Scotia, Canada B3H 3C3.
‡ Present address: George Washington University, Washington DC 20052.

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