Effects of three-baryon forces on kaon condensation in hyperon-mixed matter

Possibility of kaon-condensed phase in hyperon-mixed matter is considered on the basis chiral symmetry for kaon-baryon and kaon-kaon interactions, being combined with relativistic mean-field theory two-body baryon interaction. In addition, universal three-baryon repulsive force string-junction model phenomenological three-nucleon attractive are introduced. It shown that softening equation state stemming from both kaon condensation mixing hyperons compensated effect baryon-baryon The latter reflects density-dependence scalar vector meson mean-fields, which constrained by contribution to binding energy at saturation density. becomes stiff enough be consistent recent observations massive neutron stars.