Arts & Sciences Events
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Arts & Sciences
[PAST EVENT] Physics Colloquium
April 4, 2014
4pm - 5pm
Abstract:
We are entering a new era in which we can test confinement scale QCD in some well chosen reactions such as pi-pi and pi-N scattering, pion properties, and electromagnetic pion production from the nucleon.
Based on the spontaneous breaking of chiral symmetry, chiral perturbation theory (ChPT) is believed to approximate confinement scale QCD as demonstrated by increasingly accurate lattice calculations, particularly in pi-pi scattering. A pedagogical introduction to this area will be presented with special focus on recent, Increasingly accurate, experiments in electromagnetic pion production experiments from the proton; these test ChPT calculations and their energy region of validity. The connection between electromagnetic pion production, pi-N scattering, and quark mass effects will be illustrated.
We are entering a new era in which we can test confinement scale QCD in some well chosen reactions such as pi-pi and pi-N scattering, pion properties, and electromagnetic pion production from the nucleon.
Based on the spontaneous breaking of chiral symmetry, chiral perturbation theory (ChPT) is believed to approximate confinement scale QCD as demonstrated by increasingly accurate lattice calculations, particularly in pi-pi scattering. A pedagogical introduction to this area will be presented with special focus on recent, Increasingly accurate, experiments in electromagnetic pion production experiments from the proton; these test ChPT calculations and their energy region of validity. The connection between electromagnetic pion production, pi-N scattering, and quark mass effects will be illustrated.