Neutral pion photoproduction from the proton near threshold

Autor:	A. R. Gabler, Michael Fuchs, Aron M. Bernstein, F. Härter, P.D. Harty, V. Metag, Gisela Anton, V. Tries, J. Ahrens, R.O. Owens, J. Peise, A. Schubert, R.S. Simon, R. Beck, S. Hlavac, H. Ströher, I. J. D. McGregor, M. Röbig-Landau, B. Krusche, R. Averbeck, R. W. Novotny
Rok vydání:	1996
Předmět:	Physics Nuclear and High Energy Physics Photon Chiral perturbation theory Proton Spectrometer Nuclear Theory Nuclear physics Pion Amplitude Physics::Accelerator Physics Atomic physics Nuclear Experiment Multipole expansion Microtron
Zdroj:	Physics Letters B. 368:20-25
ISSN:	0370-2693
DOI:	10.1016/0370-2693(95)01488-8
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9f93c68e77d525782b652ae6e572a154 https://doi.org/10.1016/0370-2693(95)01488-8 Zobrazit plný text záznamu Full Text from ScienceDirect