Quasifree production of s in the reaction C12(K-,+)

The quasifree production of hyperons by K- on C and Li has been calculated. A purely kinematical model has been used to correlate experimental N(K-,+)Y cross sections with the reaction amplitude of the kaon with a bound nucleon. In all cases one observes experimental points at lower missing mass values than the computed quasifree production cutoff. This is interpreted that a bound hypernucleus state exists.