- Este evento ha pasado.
octubre 6, 2017 @ 2:30 pm - 3:00 pm
Speaker: Santiago Cortés (Universidad de Los Andes, Colombia)
Titulo: Large-N pion Scattering, Finite-Temperature Effects and Chiral Symmetry Restoration
Día: viernes 6 de octubre
Lugar: Seminario Física Teórica II
Resumen: In this work, we show the main results concerning Chiral QCD-like Effective models in which nonperturbative phenomena are analyzed. Chiral Symmetry Restoration is studied via a Large-N nonlinear sigma model using two approaches: the first one considers a diagrammatic way to obtain Scattering amplitudes and poles such that thermal properties and quantities like scalar susceptibilites are easily obtained, whilst the second one shows the way to obtain a finite partition function and along with it, a proper order parameter. Generation of light bound states and resonances is analyzed with a nonconformal AdS/CFT approach; in this case, poles are obtained from propagators built up from a classic 5-dimensional action for noninteracting particles. These results are compared with experimental and lattice data, showing an outstanding concordance.