Δ isobar production in the 4He p-->3H pnπ+ reaction
Abstract
The 4He p--> 3H pnπ+ reaction channel has been investigated at an incident 4He momentum of 8.6 GeV/c in an exclusive approach. It has been shown that the reaction mainly proceeds via pp-->pnπ+ interaction with (pπ+) from Δ++, while triton is a spectator. The anisotropic angular distribution of the nucleons causes the splitting of (3Hn) invariant mass and leads to a natural separation of the interactions occuring either in proton or 4He vertices. Effects such as the shift of peak position in the (pπ+) invariant mass distribution have not been observed.
- Publication:
-
Physical Review C
- Pub Date:
- January 1999
- DOI:
- 10.1103/PhysRevC.59.405
- Bibcode:
- 1999PhRvC..59..405G
- Keywords:
-
- 25.40.Ve;
- 14.20.Gk;
- 25.10.+s;
- 25.55.-e;
- Other reactions above meson production thresholds;
- Baryon resonances with S=0;
- Nuclear reactions involving few-nucleon systems;
- <sup>3</sup>H- <sup>3</sup>He- and <sup>4</sup>He-induced reactions