Journal article

Publication year: 2002

Pages: 493-499

Journal: The European Physical Journal A

Volume number: 13

Issue number: 4

ISSN: 1434-6001

eISSN: 1434-601X

DOI Link: https://doi.org/10.1140/epja/iepja1345

Publisher: Springer

Abstract: 
The photoproduction of eta-mesons from H-2 and He-4 has been studied for energies close to the production thresholds. The experiments were carried out with the tagged photon beam of the Mainz MAMI accelerator. The eta-mesons were detected via their two photon decays with the electromagnetic calorimeter TAPS. Total cross-sections, angular and momentum distributions of the eta-mesons have been determined for both reactions. The total cross-sections in the threshold region show a large enhancement over the predictions of a participant-spectator model, indicating significant final-state interaction effects. The results are compared to recent model calculations taking into account nucleon-nucleon and nucleon-eta final-state interaction effects on different levels of sophistication.

Harvard Citation style: Hejny, V., Weiss, J., Achenbach, P., Ahrens, J., Annand, J., Beck, R., et al. (2002) Threshold enhancement in η photoproduction from ²H and ⁴He, The European Physical Journal A, 13(4), pp. 493-499. https://doi.org/10.1140/epja/iepja1345

APA Citation style: Hejny, V., Weiss, J., Achenbach, P., Ahrens, J., Annand, J., Beck, R., Kotulla, M., Krusche, B., Kuhr, V., Leukel, R., MacGregor, I., Metag, V., Novotny, R., de León, V., Rambo, F., Schmidt, A., Schumacher, M., Siodlaczek, U., Ströher, H., ...Wolf, M. (2002). Threshold enhancement in η photoproduction from ²H and ⁴He. The European Physical Journal A. 13(4), 493-499. https://doi.org/10.1140/epja/iepja1345