Neutral pion photoproduction from the proton near threshold

Fuchs, M. and Ahrens, J. and Anton, G. and Averbeck, R. and Beck, R. and Bernstein, A. M. and Gabler, A. R. and Harter, F. and Harty, P. D. and Hlavac, S. and Krusche, B. and McGregor, I. J. D. and Metag, V. and Novotny, R. and Owens, R. O. and Peise, J. and RobigLandau, M. and Schubert, A. and Simon, R. S. and Stroher, H. and Tries, V.. (1996) Neutral pion photoproduction from the proton near threshold. Physics letters. B, Vol. 368, H. 1-2. pp. 20-25.

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Official URL: http://edoc.unibas.ch/dok/A5261991

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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 E(0+) 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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:54

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