Diffractive and Coulomb Dissociation of Pions Into Three Charged Pions at Low Momentum Transfer at Compass
Abstract
This paper presents an analysis of π- Pb → X- Pb → π-π-π+ Pb events at 190 GeV/c beam momentum and low four-momentum transfer t‧ < 0.01 (GeV/c)2. Coherent scattering off the lead nucleus as a whole dominates with contributions from Reggeon, Pomeron and photon exchange. Photoproduction becomes apparent at lowest t‧ and can be extracted statistically as well as by a partial-wave analysis, indicating also the overlap of diffractive and photo-production of the 3π events.
- Publication:
-
International Journal of Modern Physics A
- Pub Date:
- 2011
- DOI:
- 10.1142/S0217751X11052736
- Bibcode:
- 2011IJMPA..26..751G
- Keywords:
-
- Hadron spectroscopy;
- light meson spectrum;
- diffractive dissociation;
- photo-production;
- partial-wave analysis;
- COMPASS;
- 13.20.-v;
- 13.25.-k;
- 13.60.Le;
- 14.40.Be;
- Leptonic semileptonic and radiative decays of mesons;
- Hadronic decays of mesons;
- Meson production