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

*Leading Talk* Precise dispersive determination of pion-nucleon scattering and the sigma term

Jun 30, 2015, 2:30 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 3 - Hadron Structure & Meson-Baryon Interaction WG


Jacobo Ruiz de Elvira (HISKP, University of Bonn)


Starting from hyperbolic dispersion relations for the invariant amplitudes of πN scattering together with crossing symmetry and unitarity, we derive and solve a closed system of integral equations for the partial waves of both s-channel (πN → πN) and t-channel (ππ →NN) reactions, called Roy-Steiner equations. Special attention is given to the possible sources of uncertainties and to the obtained σpiN term value.

Primary author

Jacobo Ruiz de Elvira (HISKP, University of Bonn)


Prof. Bastian Kubis (University of Bonn) Dr Martin Hoferichter (TU Darmstadt) Prof. Ulf Meissner (Bonn University)

Presentation materials