Abstract

• In this research work, five single-^ hypernuclei which were detected in nuclear emulsion of KEKPS E373 experiment are analyzed by applying relativistic kinematics. The analyzed single-^ hypernuclei decayed into a charged particle and invisible neutral particles. The ranges and position angles of charged particle tracks are firstly measured in nuclear emulsion. To perform kinematical analysis, both mesonic and non-mesonic decay of single-^ hypernuclei are taken into account. The kinetic energy and momentum of charged particle decay products are extracted by range-energy relation and that of neutral particles are calculated by momentum conservation. Moreover, possible masses of single-^ hypernuclei are deduced by mass-energy relation equation. Due to contamination of neutral particles, the single-^ hypernuclei cannot be identified uniquely and the calculated masses are slightly less than known masses within the acceptable limit. According to our analysis, it is found that the possible species of single-^ hypernuclei are either H 3 ^ (or) H 4 ^ and their decay products of charged particles are possible to be proton (or) deuteron.