Measurement of the p̄p → n̄n cross section at low p̄ momenta

Abstract First measurements of the differential cross section are presented for p p → n n at LEAR in the momentum range between 180 and 600 MeV/ c . The differential cross sections show a forward peaking followed by a smooth drop-off. No indication of the “bump-dip” structure reported at higher momenta has been observed. The angle-integrated charge-exchange cross sections are determined down to E n n cm = 6.6 MeV .