June 29, 2015 to July 3, 2015
Europe/Rome timezone

Constraints on the chiral unitary KN amplitude from πΣK photoproduction data

Jul 2, 2015, 4:50 PM
Room PS4 (Building E, Polo Fibonacci, Pisa)

Room PS4

Building E, Polo Fibonacci, Pisa

Talk Hadron Structure and Meson-Baryon Interaction Working Group Parallel Session 6 - Hadron Structure & Meson-Baryon Interaction WG


Maxim Mai (HISKP, University of Bonn)


A chiral unitary approach for antikaon-nucleon scattering in on-shell factorization is studied. We find multiple sets of parameters for which the model describes all existing hadronic data similarly well. We confirm the two-pole structure of the Λ(1405). The narrow Λ(1405) pole appears at comparable positions in the complex energy plane, whereas the location of the broad pole suffers from a large uncertainty. In the second step, we use a simple model for photoproduction of K+ πΣ off the proton and confront it with the experimental data from the CLAS Collaboration. It is found that only a few of the hadronic solutions allow for a consistent description of the CLAS data within the assumed reaction mechanism.

Primary author

Maxim Mai (HISKP, University of Bonn)


Prof. Ulf-G. Meißner (Univ. Bonn and FZ Jülich)

Presentation materials