NT Seminar - Felipe Ortega Gama, William & Mary
Description
Speaker: Felipe Ortega Gama, William & Mary
Title: The structure of two hadron systems from QCD
Abstract:Â Exotic hadrons can be easily identified whenever their quantum numbers are forbidden for conventional states, but all exotic states are expected to have a non-trivial configuration of quarks and gluons within them. As most of these states are unstable in QCD, probing this internal structure is quite challenging. In this talk, I will describe the theoretical efforts to extract the structural information of exotic states, and more generally any bound or resonant state coupled to a two-hadron system, directly from first-principles QCD calculations. The main ingredient of this method relies on turning the finite-volume dependence of lattice QCD calculations, which typically prevents us from directly accessing multi-particle observables, into a tool from which to extract infinite-volume transition form factors. To illustrate this approach, I will describe a recent calculation extracting the energy-dependent vector form factor of a two-pion isotensor system, as well as a lattice EFT calculation of a two-nucleon system with a deuteron-like ground state.
Title: The structure of two hadron systems from QCD
Abstract:Â Exotic hadrons can be easily identified whenever their quantum numbers are forbidden for conventional states, but all exotic states are expected to have a non-trivial configuration of quarks and gluons within them. As most of these states are unstable in QCD, probing this internal structure is quite challenging. In this talk, I will describe the theoretical efforts to extract the structural information of exotic states, and more generally any bound or resonant state coupled to a two-hadron system, directly from first-principles QCD calculations. The main ingredient of this method relies on turning the finite-volume dependence of lattice QCD calculations, which typically prevents us from directly accessing multi-particle observables, into a tool from which to extract infinite-volume transition form factors. To illustrate this approach, I will describe a recent calculation extracting the energy-dependent vector form factor of a two-pion isotensor system, as well as a lattice EFT calculation of a two-nucleon system with a deuteron-like ground state.