The short-range baryon-baryon interaction in a chiral constituent quark model

The previous analysis of the short-range NN repulsion originating from the Goldstone boson exchange hyperfine interaction between constituent quarks i s revisited. We study in which respects the repulsion depends on the radial form of the spin-spin quark-quark force. We show that while the radial for m affects the structure of the 6Q wave function, the short-range repulsion in the NN system persists in any case. We extend our analysis to other YN a nd YY (flavor octet-octet) systems and demonstrate that the flavor-spin hyp erfine interaction implies a short-range repulsion in these B = 2 systems a s well. (C) 2001 Elsevier Science B.V. All rights reserved.