Prof.
Jose Pelaez
(Universidad Complutense de Madrid)
15/03/2018, 09:30
I present here some recent results we obtained by applying dispersion relations and other methods based on analyticity on the complex plane, to determine scattering amplitudes with pions and kaons from data and to determine resonance parameters.
Matthew Shepherd
(Indiana University)
15/03/2018, 10:00
If one examines the rules for constructing hadrons as suggested by the QCD Lagrangian, there is no obvious reason why nature should be limited to just quark-antiquark mesons and three-quark baryons. In the last decade, numerous new experimental results, primarily for hadrons containing charm quarks, suggest that the hadron spectrum may in fact contain more complex constructions of quarks and...
Mr
Jannes Nys
(Ghent University)
15/03/2018, 10:30
We have conducted studies on the production mechanism of various channels, which are being analyzed at Jefferson Lab. These include pseudoscalar and vector meson production. Using the constraint of analyticity of the amplitudes, we are able to propagate experimental information from one energy regime to the other. This approach relates properties of the baryon spectrum to the dynamics of meson...
Mr
Boris Grube
(Technische Universität München)
15/03/2018, 11:30
COMPASS is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron aimed at studying the structure and spectrum of hadrons. One of the main goals of the experiment is the study of the light-meson spectrum. In diffractive reactions with a 190 GeV/c negative pion beam, a rich spectrum of isovector mesons is produced. The resonances decay typically into multi-body final...
Mr
Malwin Niehus
(HISKP, University of Bonn)
15/03/2018, 12:00
Usually the simulation of scattering processes in lattice QCD is carried out at unphysical high values of the quark masses [1]. Hence, a method to extrapolate data obtained in lattice calculations to physical masses is needed to allow for comparison between theory and experiment. To obtain a sound extrapolation, dispersion relations and chiral perturbation theory can be invoked. While a simple...
Alessandro Pilloni
(ROMA1)
15/03/2018, 12:30
I will discuss some recent development in amplitude analysis to improve the description of exotic states
Prof.
Raul Briceno
(ODU & JLab)
15/03/2018, 14:30
The non-perturbative nature of quantum chromodynamics (QCD) has historically left a gap in our understanding of the connection between the fundamental theory of the strong interactions and the rich structure of experimentally observed phenomena. For the simplest properties of stable hadrons, this can now be circumvented using lattice QCD. In this talk I discuss a path that will allow us to...
Dr
Christopher Thomas
(University of Cambridge)
15/03/2018, 15:00
I will discuss recent progress in studying excited and exotic mesons using first-principles lattice QCD calculations, an area where there have been significant advances in the last few years. In particular, some results on excited mesons, resonances and related phenomena in the light and heavy sectors will be highlighted, including work on heavy tetraquarks, open-charm mesons and light scalar...
Prof.
John Bulava
(University of Southern Denmark, CP3-Origins Institute)
15/03/2018, 15:30
I will review the methods used to calculate two-hadron scattering
amplitudes from lattice QCD. Particular emphasis will be placed on controlling the various systematic errors inherent in such calculations, such as those due to the lattice spacing and finite volume. As illustrative examples, I will discuss recent and ongoing results for amplitudes containing the rho(770), K*(892),...
Dr
Francesco Giacosa
(Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, Frankfurt)
15/03/2018, 16:30
A standard quark-antiquark state gets dressed by meson-meson clouds
corresponding to its decay product and its pole moves down in the complex
plane. If some conditions are met (coupling constant strong enough nearby
energy threshold(s)), additional. so-called companion poles may emerge, which
correspond to a type of dynamically generated states. For instance, the light
scalar states...
