The measurement of the pp to K(+)n Sigma(+) reaction near threshold

Valdau, Y.; Wilkin, C.

doi:10.1016/j.physletb.2010.11.072

Journal Article

PreJuSER-20170

The measurement of the pp to K(+)n Sigma(+) reaction near threshold

Valdau, Y.FZJ* ; Wilkin, C.FZJ*

2011
North-Holland Publ. Amsterdam

Physics letters / B 696, (2011) [10.1016/j.physletb.2010.11.072]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10306 doi:10.1016/j.physletb.2010.11.072

Abstract: It is shown that a recent extraction of the total cross section for pp -> K(+)n Sigma(+) from inclusive K+ production data by the HIRES Collaboration [Phys. Lett. B 692 (2010) 10] is in conflict with experimental data on the exclusive pp -> K+ p Lambda reaction. The HIRES result may be interpreted as an upper bound. which is not inconsistent with the much lower values that already exist in the literature. (C) 2010 Elsevier B.V. All rights reserved.

Keyword(s): Sigma+: hadroproduction ; threshold ; channel cross section ; p p: interaction ; K+: hadroproduction ; data analysis method ; coupled channel ; Juelich COSY PS ; p p --> Sigma+ n K+ ; ((1)) ; Kaon production (auto) ; Sigma production (auto) ; Threshold effects (auto)

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Note: Vigorous interactions within the ANKE Collaboration, especially with C. Hanhart, A. Kacharava, V.P. Koptev and H. Stroller, prompted this work. Discussions with A. Sibirtsev regarding the transformation between the COSY-TOF and COSY-HIRES kinematics were very helpful. We are grateful to W. Eyrich and W. Schroeder for providing us with the numerical values of the COSY-TOF data of Ref. [8]. Valuable discussions with H. Clement, S. Schadmand and J. Ritman are gratefully acknowledged. This work was supported by the JCHP FFE.

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