This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevC.79.015208 in citations.
Please use the identifier: http://hdl.handle.net/2128/10456 in citations.
Near-threshold production of the eta meson via the quasifree pn -> pn eta reaction
Near-threshold production of the eta meson via the quasifree pn -> pn eta reaction
Total cross sections for the quasifree pn -> pn eta reaction in the range from the kinematical threshold up to 20 MeV excess energy have been determined. At threshold they exceed corresponding cross sections for the pn -> pn eta reaction by a factor of about 3 in contrast to the factor of 6 es...
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Personal Name(s): | Moskal, P. |
---|---|
Czyzykiewicz, R. / Adam, H. / et, al. | |
Contributing Institute: |
Experimentelle Hadronstruktur; IKP-1 |
Published in: | Physical Review C Physical review / C, 79 79 (2009 2009) 1 1, S. 015208 015208 |
Imprint: |
Woodbury, NY
Inst.
2009
2009-01-23 2009-01-01 |
Physical Description: |
015208 |
DOI: |
10.1103/PhysRevC.79.015208 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Physical Review C
79 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10456 in citations.
Total cross sections for the quasifree pn -> pn eta reaction in the range from the kinematical threshold up to 20 MeV excess energy have been determined. At threshold they exceed corresponding cross sections for the pn -> pn eta reaction by a factor of about 3 in contrast to the factor of 6 established for higher excess energies. To large extent, the observed decrease of the ratio s(pn -> pn eta)/s=sigma(pn -> pn eta) toward threshold may be assigned to the different energy dependence of the proton-proton and proton-neutron final-state interactions. The experiment was conducted using a proton beam of the cooler synchrotron COSY and a cluster jet deuteron target. The proton- neutron reactions were tagged by the spectator proton whose momentum was measured for each event. Protons and neutron outgoing from the pn -> pn eta reaction have been registered by means of the COSY-11 facility, an apparatus dedicated for threshold meson production. |