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- Title
Near-threshold production of a<sub>0</sub>(980)-mesons in the reaction.
- Authors
Grishina, V. Yu.; Kondratyuk, L. A.; Büscher, M.; Cassing, W.
- Abstract
Using an effective Lagrangian approach as well as the Quark-Gluon Strings Model, we analyze near-threshold production of a0(980)-mesons in the reaction NN → dK &Kmacr; as well as the background of non-resonant K &Kmacr;-pair production. We argue that the reaction pp → dK+ &Kmacr;0 at an energy release Q ≤ 100MeV is dominated by the intermediate production of the a0(980)-resonance. At larger energies the non-resonant K+ &Kmacr;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-Jülich for Q ≤ 107 MeV the a0+ signal can reliably be separated from the non-resonant K+ &Kmacr;00 background.
- Subjects
MESONS; LAGRANGIAN functions; QUARK-gluon interactions; LAGRANGE equations; PHYSICAL sciences; RESONANCE
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2004, Vol 21, Issue 3, p507
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/i2004-10004-2