Neutral pion photoproduction from the proton near threshold

Fuchs, M. et al. (1996) Neutral pion photoproduction from the proton near threshold. Physics Letters B, 368(1-2), pp. 20-25.

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Differential and total cross sections for the photoproduction of neutral pions from the proton have been measured for incident photon energies from 140-270 MeV, using the photon spectrometer TAPS at the tagged photon beam of the 855 MeV Mainz Microtron. The energy dependence of the s- and p-wave multipoles close to threshold was deduced from a multipole fit and a multipole analysis. The extracted s-wave amplitude Eo+ at threshold is found to be significantly smaller than the prediction of the classical low energy theorems, but is in reasonable agreement with the chiral perturbation theory.

Item Type:Articles
Glasgow Author(s) Enlighten ID:MacGregor, Professor Douglas and Owens, Professor Robert
Authors: Fuchs, M., Ahrens, J., Anton, G., Averbeck, R., Beck, R., Bernstein, A.M., Gabler, A.R., Harter, F., Harty, P.D., Hlavac, S., Krusche, B., McGregor, I.J.D., Metag, V., Novotny, R., Owens, R.O., Peise, J., RobigLandau, M., Schubert, A., Simon, R.S., Stroher, H., and Tries, V.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Research Group:Nuclear Physics
Journal Name:Physics Letters B
Journal Abbr.:Phys. Lett. B
Publisher:Elsevier BV
ISSN (Online):1873-2445

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