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Jacobo Ruiz de Elvira

diciembre 20, 2017 @ 8:00 am - 5:00 pm

Jacobo Ruiz de Elvira
Albert Einstein Center for Fundamental Physics,
Institute for Theoretical Physics, University of Bern,
Día: 20 de diciembre
Lugar: Seminario Física Teórica II
Title: Dispersive analysis of pion-nucleon scattering and the pion-nucleon sigma term.
Abstract: A precise understanding of low-energy pion-nucleon interactions is central for many areas in nuclear and hadronic physics, ranging from the scalar couplings of the nucleon to the long-range part of two-pion-exchange potentials and three-nucleon forces in Chiral Effective Field Theory. We present a calculation that combines the general principles of analyticity, unitarity, and crossing symmetry with modern high-precision data of hadronic atoms, leading to a phenomenological description of the pion-nucleon amplitude with unprecedented rigor and accuracy. Consequences for the pion-nucleon sigma-term, the electromagnetic nucleon form factor and the matching to Chiral Perturbation Theory will be also discussed.


diciembre 20, 2017
8:00 am - 5:00 pm