# The 12th International Workshop on the Physics of Excited Nucleons

10-14 June 2019
Bonn, Campus Poppelsdorf
Europe/Zurich timezone

## Λ (1405) with one pole

13 Jun 2019, 15:00
30m
HS 7 ()

### HS 7

Partial wave analyses and baryon resonance parameter extraction

### Speaker

Eberhard Klempt (University of Bonn)

### Description

Low-energy data on the three charge states in $\gamma p \to K^+(\Sigma\pi)$ from CLAS at JLab, on $K^-p\to \pi^0\pi^0\Lambda$ and $\pi^0\pi^0\Sigma$ from the Crystal Ball at BNL, bubble chamber data on $K^-p\to\pi^-\pi^+\pi^{\pm}\Sigma^{\mp}$, low-energy $K^-p$ differential cross sections for elastic and charge exchange scattering, total cross sections on $K^-$ induced reactions, and data on the $K^-p$ atom are fitted with the BnGa partial-wave-analysis program. We find that the $\Lambda(1405)$ region can be fitted well with just one isoscalar spin-1/2 negative-parity pole, the $\Lambda(1405)$, and background contributions.

### Primary author

Eberhard Klempt (University of Bonn)