Journalartikel

Jahr der Veröffentlichung: 2004

Seiten: 507-520

Zeitschrift: The European Physical Journal A

Bandnummer: 21

Heftnummer: 3

ISSN: 1434-6001

eISSN: 1434-601X

DOI Link: https://doi.org/10.1140/epja/i2004-10004-2

Verlag: Springer

Abstract: 
Using an effective Lagrangian approach as well as the Quark-Gluon Strings Model, we analyze near-threshold production of a(0)(980)-mesons in the reaction NN --> dK (K) over bar as well as the background of non-resonant K (K) over bar -pair production. We argue that the reaction pp --> dK+(K) over bar (0) at an energy release Q less than or equal to 100 MeV is dominated by the intermediate production of the a(0)(980)-resonance. At larger energies the non-resonant K+(K) over bar (0)-pair production-where the kaons are produced in a relative P-wave-becomes important. The effects of final-state interactions are evaluated in a unitarized scattering length approach and found to be in the order of a 20% suppression close to threshold. Thus, in present experiments at the Cooler Synchrotron COSY-Julich for Q less than or equal to 107 MeV the a(0)(+) signal can reliably be separated from the non-resonant K+(K) over bar (0) background.

Harvard-Zitierstil: Grishina, V., Kondratyuk, L., Büscher, M. and Cassing, W. (2004) Near-threshold production of a₀(980)-mesons in the reaction pp → dK⁺(K)over-bar⁰, The European Physical Journal A, 21(3), pp. 507-520. https://doi.org/10.1140/epja/i2004-10004-2

APA-Zitierstil: Grishina, V., Kondratyuk, L., Büscher, M., & Cassing, W. (2004). Near-threshold production of a₀(980)-mesons in the reaction pp → dK⁺(K)over-bar⁰. The European Physical Journal A. 21(3), 507-520. https://doi.org/10.1140/epja/i2004-10004-2