This title appears in the Scientific Report :
2009
Please use the identifier:
http://hdl.handle.net/2128/13904 in citations.
Isospin dependence of the eta-prime meson production in nucleon-nucleon collisions.
Isospin dependence of the eta-prime meson production in nucleon-nucleon collisions.
The upper limit of the total cross section for quasi-free pn $\rightarrow pn\eta'$ reaction has been determined in the excess energy range near the kinematical threshold. The measurement has been carried out at the COSY–11 detection setup using a proton beam and a deuteron cluster target. The i...
| Personal Name(s): | Klaja, Joanna (Corresponding author) |
|---|---|
| Contributing Institute: |
Experimentelle Hadronstruktur; IKP-1 |
| Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
2009
|
| Physical Description: |
91 p. |
| Dissertation Note: |
Jagiellonian University, Krakow |
| Document Type: |
Book Dissertation / PhD Thesis |
| Research Program: |
Physik der Hadronen und Kerne |
| Series Title: |
Berichte des Forschungszentrums Jülich
4313 |
| Subject (ZB): | |
| Link: |
OpenAccess |
| Publikationsportal JuSER |
|
The upper limit of the total cross section for quasi-free pn $\rightarrow pn\eta'$ reaction has been determined in the excess energy range near the kinematical threshold. The measurement has been carried out at the COSY–11 detection setup using a proton beam and a deuteron cluster target. The identification of the $\eta$' meson has been performed using the missing mass technique. The energy dependence of the upper limit of the cross section is extracted with a fixed proton beam momentum of p$_{beam}$ =3.35 GeV/c and exploiting the Fermi momenta of nucleons inside the deuteron. The data cover a range of centre-of-mass excess energies from 0 to 24 MeV. The experimentally determined upper limit of the ratio R$_{\eta'}$ = $\frac{\sigma(pn\rightarrow pn\eta')}{\sigma(pp\rightarrow pp\eta')}$, which is smaller than the ratio for the $\eta$ meson, excludes the excitation of the S$_{11}$(1535) resonance as a dominant production mechanism of the $\eta$' meson in nucleon-nucleon collisions. At the same time, the determined upper limits of R$_{\eta'}$ go in the direction of what one would expect in the glue production and production via mesonic currents. For quantitative tests of these mechanisms an order of magnitude larger statistics and a larger energy range would be required. This can be reached with the WASA-at-COSY facility. |