Mechanism of Near-Threshold Production of the {eta} Meson

Measurements of the analyzing power for the p-vectorp{yields}pp{eta} reaction have been performed at excess energies of Q=10 and 36 MeV. The determined analyzing power is essentially consistent with zero, implying dominance of the s wave at both excess energies. The angular dependence of the analyzi...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2007-03, Vol.98 (12)
Main Authors: Czyzykiewicz, R., Moskal, P., Janusz, M., Klaja, P., Przerwa, J., IKP and ZEL, Forschungszentrum Juelich, 52425 Juelich, Adam, H.-H., Khoukaz, A., Taeschner, A., Budzanowski, A., Czerwinski, E., Gil, D., Hodana, M., Jarczyk, L., Kamys, B., Piskor-Ignatowicz, C., Rejdych, B., Smyrski, J., Grzonka, D., Kilian, K., Lorentz, B.
Format: Article
Language:English
Subjects:
ETA MESONS
EXCITATION
ISOSPIN
MEV RANGE 10-100
PARTICLE PRODUCTION
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PIONS
POLARIZATION-ASYMMETRY RATIO
PROTON-PROTON INTERACTIONS
S WAVES
TOTAL CROSS SECTIONS
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Measurements of the analyzing power for the p-vectorp{yields}pp{eta} reaction have been performed at excess energies of Q=10 and 36 MeV. The determined analyzing power is essentially consistent with zero, implying dominance of the s wave at both excess energies. The angular dependence of the analyzing power, combined with the isospin dependence of the total cross section for the {eta} meson production in nucleon-nucleon collisions, reveal that the excitation of the nucleon to the S{sub 11}(1535) resonance is predominantly due to the exchange of the {pi} meson between the colliding nucleons.
ISSN:0031-9007
1079-7114
DOI:10.1103/PHYSREVLETT.98.122003