English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The upper limit of the total cross section for quasi-free pn -> pn eta-primereaction has been determined in the excess energy range near the kinematicthreshold. The measurement has been carried out at the COSY-11 detection setupusing a proton beam and a deuteron cluster target. The identification of theeta-prime meson has been performed using the missing mass technique. The energydependence of the upper limit of the cross section is extracted with a fixedproton beam momentum of p_beam}=3.35GeV/c and exploiting the Fermi momenta ofnucleons inside the deuteron. The data cover a range of centre-of-mass excessenergies from 0 to 24 MeV. The experimentally determined upper limit of theratio R(eta-prime)=sigma(pn -> pn eta-prime) sigma(pp -> pp eta-prime), whichis smaller than the ratio for the eta meson, excludes the excitation of theS_11(1535) resonance as a dominant production mechanism of the eta-prime mesonin nucleon-nucleon collisions. At the same time, the determined upper limits ofR(eta-prime) go in the direction of what one would expect in the glueproduction and production via mesonic currents. For quantitative tests of thesemechanisms an order of magnitude larger statistics and a larger energy rangewould be required. This can be reached with the WASA-at-COSY facility.

Isospin dependence of the eta-prime meson production in collisions of nucleons