Enhancements observed in the two-proton invariant mass distribution in the pionless deuteron breakup at 3.3 GeV/c |
| |
| Authors: | M G Dolidze V V Glagolev G I Lykasov J Urban A K Kacharava D G Mirianashvili M S Nioradze Z R Salukvadze |
| |
| Institution: | 1. Joint Institute for Nuclear Research, Dubna, USSR
2. High Energy Physics Institute, Tbilisi, USSR
|
| |
| Abstract: | A sample of “non-spectator” events in the pionless deuteron breakup at a 3.3 GeV/c momentum has been investigated by means of a 1 m HBC at the JINR, Dubna. The two-proton invariant mass spectrum in the charge exchange channel exhibits two enhancements for masses of 2,010 MeV/c2 and 2,160 MeV/c2. Theoretical calculations taking into account one-pion exchange diagrams and virtual pion absorption by the deuteron have been carried out. It has been shown that the enhancement atM pp=2,010 MeV/c2 can be explained if some kind of singularity near theN-N threshold is required. The observed maximum atM pp=2,160 MeV/c2 is caused mainly by intermediate Δ production and pion absorption on the deuteron. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
