Journal article
Authors list: Bartholomy, O.; Bogendoerfer, R.; Crede, V.; Fabry, I.; Anisovich, A. V.; Anton, G.; Bantes, R.; Beloglazov, Y. A.; Castelijns, R.; Ehmanns, A.; Ernst, J.; Flemming, H.; Foesel, A.; Fuchs, M.; Funke, Ch.; Gothe, R.; Gridnev, A. B.; Gutz, E.; Hoeffgen, S.; Horn, I.; Hoebl, J.; Junkersfeld, J.; Kalinowsky, H.; Klein, F.; Klempt, E.; Koch, H.; Konrad, M.; Kopf, B.; Krusche, B.; Langheinrich, J.; Loehner, H.; Lopatin, I. V.; Lotz, J.; Matthaey, H.; Menze, D.; Messchendorp, J.; Nikonov, V. A.; Novinski, D. V.; Ostrick, M.; Van Pee, H.; Radkov, A. K.; Sarantsev, A. V.; Schadmand, S.; Schmidt, C.; Schmieden, H.; Schoch, B.; Suft, G.; Sumachev, V. V.; Szczepanek, T.; Thoma, U.; Walther, D.; Weinheimer, Ch.
Publication year: 2007
Pages: 133-146
Journal: The European Physical Journal A
Volume number: 33
Issue number: 2
ISSN: 1434-6001
eISSN: 1434-601X
DOI Link: https://doi.org/10.1140/epja/i2007-10455-9
Publisher: Springer
Abstract:
Photoproduction of eta -mesons was studied with the Crystal-Barrel detector at ELSA for photon energies in the range from 0.75 to 3GeV. Total and differential cross-sections are presented. The eta mesons are detected in two decay modes, in eta -> 2 gamma and in eta -> 3 pi(0) -> 6 gamma . The cross-sections vary slowly as functions of energy and eta production angle suggesting that only few resonances make significant contributions to the cross-section. For photon energies above 1.5GeV, the differential cross-sections show a strong forward peak due to meson exchanges in the t channel. A comparison of the eta-hotoproduction cross-sections with SAID and MAID as well as with a partial-wave analysis performed on our data in combination with other data sets shows good agreement. The Bonn-Gatchina partial-wave analysis suggests that the largest contribution to eta photoproduction for energies below 3GeV proceeds via three resonances, the well-known N(1535)S-11 , via N(1720)P-13 , and a newly suggested N(2070)D-15 .
Citation Styles
Harvard Citation style: Bartholomy, O., Bogendoerfer, R., Crede, V., Fabry, I., Anisovich, A., Anton, G., et al. (2007) Photoproduction of η-mesons off protons, The European Physical Journal A, 33(2), pp. 133-146. https://doi.org/10.1140/epja/i2007-10455-9
APA Citation style: Bartholomy, O., Bogendoerfer, R., Crede, V., Fabry, I., Anisovich, A., Anton, G., Bantes, R., Beloglazov, Y., Castelijns, R., Ehmanns, A., Ernst, J., Flemming, H., Foesel, A., Fuchs, M., Funke, C., Gothe, R., Gridnev, A., Gutz, E., Hoeffgen, S., ...Weinheimer, C. (2007). Photoproduction of η-mesons off protons. The European Physical Journal A. 33(2), 133-146. https://doi.org/10.1140/epja/i2007-10455-9
Keywords
DIFFERENTIAL CROSS-SECTIONS; GAMMA-P; LAMBDA; LIGHT-BARYON SPECTRUM; PHOTON ENERGIES; POSITIVE PION-PHOTOPRODUCTION; RELATIVISTIC QUARK-MODEL; RESONANCES; SIGMA-BEAM ASYMMETRY
