Objectif This project will investigate the newly observed and poorly-understood `XYZ' resonances seen in the spectrum of charmonium resonances around the open-charm threshold. These states are difficult to explain in a simple quark model and a full understanding of their nature requires lattice quantum chromodynamics to provide an ab-initio framework. One important candidate to describe some of these states is a tetraquark configuration of a bound charm quark and anti-quark coupled non-trivially to a light quark and anti-quark. The technical expertise to perform these lattice calculations has only recently been developed and it will be tested and extended in this collaborative project by combining the expertise of the fellow and the PI. To understand the nature of unstable states at thresholds for strong decays requires the lattice calculation of multi-meson states interacting in finite volume and analysed using the Luescher method, extended to include coupled-channel scattering amplitudes. These new techniques, pioneered by the fellow will be applied for the first time to study charmed mesons in D-Dbar and Ds-Dsbar scattering in the energy range relevant for studies of the mysterious XYZ resonances. Champ scientifique engineering and technologymaterials engineeringcompositesnatural sciencesphysical sciencesquantum physicsquantum field theorynatural sciencesphysical sciencestheoretical physicsparticle physicsgluonsnatural sciencesphysical sciencestheoretical physicsparticle physicsquarks Mots‑clés Hadron physics exotic mesons resonances Lattice QCD coupled-channel scattering Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Thème(s) MSCA-IF-2016 - Individual Fellowships Appel à propositions H2020-MSCA-IF-2016 Voir d’autres projets de cet appel Régime de financement MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF) Coordinateur THE PROVOST, FELLOWS, FOUNDATION SCHOLARS & THE OTHER MEMBERS OF BOARD, OF THE COLLEGE OF THE HOLY & UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN Contribution nette de l'UE € 175 866,00 Adresse COLLEGE GREEN TRINITY COLLEGE D02 CX56 DUBLIN 2 Irlande Voir sur la carte Région Ireland Eastern and Midland Dublin Type d’activité Higher or Secondary Education Establishments Liens Contacter l’organisation Opens in new window Site web Opens in new window Participation aux programmes de R&I de l'UE Opens in new window Réseau de collaboration HORIZON Opens in new window Coût total € 175 866,00