Rho-meson shape
1968; Elsevier BV; Volume: 6; Issue: 4 Linguagem: Inglês
10.1016/0550-3213(68)90001-1
ISSN1873-1562
Autores Tópico(s)High-Energy Particle Collisions Research
ResumoA detailed description is developed for the invariant dipion mass distribution in the reaction πp → ππN. Based on OPEM and modified phenomenologically this "generalized Breit-Wigner" formula accounts for peripheral production, t-dependence of the ϱ parameters, skewness of the ϱ peak, energy dependence of the ϱ width, energ-dependent departure from OPEM, background, and background interference. Contributions from other ππ partial waves are included and the possibility of ϱ being a CDD pole considered. The formula is used on a data compilation of large statistics and conclusions concerning the presence of the various terms and the ϱ parameters are reached. Finally, we compare the width of the pion-produced ϱ meson with the width of the e+e− produced ϱ meson.
Referência(s)