First observation of ψ(2S)→pn¯π-+c.c.
Abstract
Using 14×106 ψ(2S) events collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Positron Collider, the branching fractions of ψ(2S) decays to pn¯π- and p¯nπ+ and the branching fractions of the main background channels ψ(2S)→pn¯π-π0, ψ(2S)→γχc0→γpn¯π-, ψ(2S)→γχc2→γpn¯π-, and ψ(2S)→γχcJ→γpn¯π-π0 are determined. The contributions of the N* resonances in ψ(2S)→pn¯π-+c.c. are also discussed.
- Publication:
-
Physical Review D
- Pub Date:
- July 2006
- DOI:
- 10.1103/PhysRevD.74.012004
- arXiv:
- arXiv:hep-ex/0605031
- Bibcode:
- 2006PhRvD..74a2004A
- Keywords:
-
- 14.20.Gk;
- 13.25.Gv;
- 13.75.Gx;
- Baryon resonances with S=0;
- Decays of J/psi Upsilon and other quarkonia;
- Pion-baryon interactions;
- High Energy Physics - Experiment
- E-Print:
- 19 pages, 8 figures, add vertex requirement systematic error