15th International Workshop on the Physics of Excited Nucleons

Predictions of $N^*$ effects on the $\pi N\to \pi\pi N$ reactions within the ANL-Osaka Model

Not scheduled

20m

Speaker

tsung-shung Lee (Argonne National Laboratory)

Description

Using the Argonne National Laboratory-The University of Osaka (ANL-Osaka) DCC model
of meson-nucleon reactions, we predict the cross sections of
the $\pi N \to \pi \pi N$ reactions.
The model was constructed by fitting
only the two-body reactions:
$\pi N,\gamma N \to \pi N, \eta N, K\Lambda, K\Sigma$.
Thus, the results for $\pi N \to \pi \pi N$ presented here
are predictions of the ANL-Osaka DCC model,
which serve to examine the extent to which the forthcoming data from J-PARC can be described.
This study provides information for improving the extraction of nucleon resonances
that have large decay widths to $\pi\pi N$ states.
We present results for the total cross sections,
invariant mass distributions, and angular distributions.
We also identify the observables and energy regions
where the higher mass nucleon resonances in the $S_{31}$, $P_{33}$, $D_{33}$, $F_{37}$,
$D_{13}$, $D_{15}$, and $F_{15}$ partial waves can be most effectively investigated.