Journal article
Authors list: Wissmann, F; Kuhr, V; Jahn, O; Vorwerk, H; Achenbach, P; Ahrens, J; Arends, HJ; Beck, R; Camen, M; Caselotti, G; Heid, E; Hejny, V; Jennewein, P; Kondratjev, R; Kossert, K; Kotulla, M; Krusche, B; Lang, M; Leukel, R; Levchuk, MI; Lisin, V; Metag, V; Novotny, R; de León, VO; Polonski, A; Preobrashenskij, I; Rambo, F; Rosenkranz, D; Schilling, E; Schmidt, A; Schumacher, M; Seitz, B; Siodlaczek, U; Ströher, H; Thomas, A; Walcher, T; Weiss, J; Wolf, M; Zapadtka, F
Publication year: 1999
Pages: 232-245
Journal: Nuclear Physics A: Nuclear and Hadronic Physics
Volume number: 660
Issue number: 2
ISSN: 0375-9474
eISSN: 1873-1554
DOI Link: https://doi.org/10.1016/S0375-9474(99)00419-4
Publisher: Elsevier
Abstract:
Differential cross sections for Compton scattering from the free proton at Theta(gamma)(lab) = 130.7 degrees in the energy region from 200 MeV to 410 MeV and far quasi-free Compton scattering from the proton bound in the deuteron at Theta(gamma)(lab) = 148.8 degrees in the energy region from 200 MeV to 290 MeV have been measured. The free proton data are in agreement with dispersion-theory predictions based on standard parameters. The difference of the proton polarizabilities has been extracted from the quasi-free data. Our result, <(alpha)over bar> - <(beta)over bar> = [9.1 +/- 1.7(stat + syst) +/- 1.2(mod)] x 10(-4) fm(3), is in reasonable agreement with the world average of the free proton data if the backward spin polarizability gamma(pi) is taken to be -37.6 x 10(-4) fm(4) as predicted by dispersion theory in agreement with many theoretical calculations. This implies that quasi-free Compton scattering may also be used to determine the electromagnetic polarizabilities of the neutron. No indication has been found of a recently suggested new contribution to gamma(pi). (C) 1999 Elsevier Science B.V. All rights reserved.
Citation Styles
Harvard Citation style: Wissmann, F., Kuhr, V., Jahn, O., Vorwerk, H., Achenbach, P., Ahrens, J., et al. (1999) Compton scattering from the free and bound proton at backward angles above π-threshold, Nuclear Physics A: Nuclear and Hadronic Physics, 660(2), pp. 232-245. https://doi.org/10.1016/S0375-9474(99)00419-4
APA Citation style: Wissmann, F., Kuhr, V., Jahn, O., Vorwerk, H., Achenbach, P., Ahrens, J., Arends, H., Beck, R., Camen, M., Caselotti, G., Heid, E., Hejny, V., Jennewein, P., Kondratjev, R., Kossert, K., Kotulla, M., Krusche, B., Lang, M., Leukel, R., ...Zapadtka, F. (1999). Compton scattering from the free and bound proton at backward angles above π-threshold. Nuclear Physics A: Nuclear and Hadronic Physics. 660(2), 232-245. https://doi.org/10.1016/S0375-9474(99)00419-4
Keywords
DELTA-RESONANCE REGION; MAGNETIC POLARIZABILITIES; NUCLEON; PHOTOPRODUCTION; QUASI-FREE NEUTRONS; SEPARABLE REPRESENTATION; SPIN POLARIZABILITIES; TAGGED PHOTON SPECTROMETER; THETA(CMS)=75-DEGREES
