Charge transfer from the ground state of muonic hydrogen to 4He at room temperature

The present status of research of muon transfer from the ground state of muonic protium to 4He is reviewed. The analysis of a recent measurement in a triple gas mixture of H2+4He+Ne at 15 bar and room temperature is presented and the result is compared to the existing experimental and theoretical rates. The average muon transfer rate from protium to 4He determined from all lifetime measurements is λp4He=(0.42±0.04) x 10 8s-1. (orig.)