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Hadronic interaction of eta and eta-prime mesons with nucleons | | P. Moskal
; H.H. Adam
; A. Budzanowski
; R. Czyzykiewicz
; D. Grzonka
; M. Janusz
; L. Jarczyk
; B. Kamys
; A. Khoukaz
; K. Kilian
; P. Kowina
; T. Lister
; W. Oelert
; T. Rozek
; R. Santo
; G. Schepers
; T. Sefzick
; M. Siemaszko
; J. Smyrski
; S. Steltenkamp
; A. Strzalkowski
; P. Winter
; M. Wolke
; P. Wustner
; W. Zipper
; | | Date: |
4 Dec 2002 | | Journal: | Nucl.Phys. A721 (2003) 657 | | Subject: | nucl-ex | | Affiliation: | Julich, Forschungszentrum & Jagellonian U.), H.H. Adam, A. Budzanowski, R. Czyzykiewicz, D. Grzonka, M. Janusz, L. Jarczyk, B. Kamys, A. Khoukaz, K. Kilian, P. Kowina, T. Lister, W. Oelert, T. Rozek, R. Santo, G. Schepers, T. Sefzick, M. Siemaszko, J. | | Abstract: | Due to their short life-time, flavour-neutral mesons cannot be utilized as free secondary beams or targets, and therefore a study of their interaction with nucleons is not possible via direct scattering experiments. This interaction is, however, accessible via its influence on the energy dependence - and on the phase space distributions of the cross sections for reactions in which these mesons are produced. In case of the p p --> p p eta reaction the experimentally determined distributions of the differential cross sections close to the production threshold cannot be described by taking into account the S-wave proton-proton and proton-eta interaction only. Here we show that the angular distributions determined at the COSY-11 facility reveal some evidence for P-wave admixture in the proton-proton subsystem already at an excess energy as low as Q = 15.5 MeV. We also present that one can estimate the relative strength of the eta-nucleon and eta-prime-nucleon interactions by comparison of the eta and eta-prime production yield. | | Source: | arXiv, nucl-ex/0212003 | | Services: | Forum | Review | PDF | Favorites | |
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