Analysis of the3 He(K?,K +)n reaction by the potential quark model

Abstract

We analyze the production of H dihyperson (Jπ=0+,S=−2) via the (K−, K+) reaction by means of the non-relativistic quark model. First, the H mass and mass spectrum of single baryons are calculated. When the single baryon spectrum is well reproduced, the H dihyperson has the binding energies about 20 MeV or 60 MeV corresponding to the choice of the strength of the confinement potential. Using this model and parameters, cross sections for H production are estimated. A new effect, contributions from color-octetQ3⊗Q3 components of H dihyperson, is taken into account. The cross sections for H production are enhanced about ten times by these contributions. TheK+-neutron coincidence cross section for H production is found to be 99–115 nb/sr2 at theK+ forward direction forMH=2212 MeV and theK− beam momentum 1.8 GeV/c.