Combined analysis of the pn→dπ+π- and pn→pnπ+π- cross sections and implications for the interpretation of the pn→dπ+π- data
Abstract
We use recent data that show a narrow peak around s=2.37GeV in the pn→dπ+π- cross section, with about double strength at the peak than in the analogous pn→dπ0π0 reaction, and, assuming that it is due to the excitation of a dibaryon resonance, we evaluate the cross section for the pn→pnπ+π- reaction, with the final pn unbound but with the same quantum numbers as the deuteron. We use accurate techniques to determine the final state interaction in the case of the pn forming a deuteron or a positive energy state, which allow us to get the pn→pnπ+π- cross section with pn in I=0 and S=1, that turns out to be quite close or saturates the experimental pn→pnπ+π- total cross section around s=2.37GeV, depending on the angular momentum assumed. This poses problems to the assumption of the dibaryon hypothesis, which could be rendered more restrictive with future precise data on the pn→pnπ+π- reaction.
- Publication:
-
Physical Review C
- Pub Date:
- July 2013
- DOI:
- 10.1103/PhysRevC.88.014006
- arXiv:
- arXiv:1304.7698
- Bibcode:
- 2013PhRvC..88a4006A
- Keywords:
-
- 14.20.Gk;
- 13.75.Cs;
- 12.39.Fe;
- 25.40.Ve;
- Baryon resonances with S=0;
- Nucleon-nucleon interactions;
- Chiral Lagrangians;
- Other reactions above meson production thresholds;
- Nuclear Theory;
- High Energy Physics - Phenomenology
- E-Print:
- doi:10.1103/PhysRevC.88.014006