On the search for a narrow penta-quark Z${}^{+}$ baryon in NN interactions

Abstract

The possibility for an observation of a narrow penta-quark $Z^{+}$ baryon in $NN$ reactions is discussed. It is shown that the $pp\to n{\Sigma }^{+}{K}^{+}$ reaction at excess energies around 100 MeV above threshold provides optimal conditions for $Z^{+}$ baryon detection by an analysis of the $n{K}^{+}$ invariant mass spectrum, if the $Z^{+}$ mass is located around 1.5 GeV involving a rather narrow width.

Comments: 5 pages, espcrc2, including 3 ps-figures