IFIC seminar: Exotic hadrons and heavy-flavor nuclei

por Dr. Mikhail Mikhasenko (CERN)

martes 21 feb. 2023 12:00 → 14:00 Europe/Madrid

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

Hints for the exotic hadrons keeps appearing, starting from the discovery of unusual properties of the $\chi_{c1}(3872)$ meson in 2003, pleiade of charged charmonium-like states around 2010, and pentaquarks in 2015.
In the talk, I will discuss new findings in the field of the hadron spectroscopy made in the last year using data collected by the LHCb experiment: an observation of the novel class of hadrons, a doubly charmed tetraquark, Tcc, as well as hits for new tetraquarks and pentaquark with strangeness.
The tetraquark Tcc+ with the [c c ubar dbar] quark content is expected in quark model, however, the state is found extremely close to the open-charm threshold, indicating the prominent role of the $D^{*+}D^0$ interaction to the nature of the state.
I will highlight the interplay between the world of nuclei, i.e. hadronic molecules, and genuine QCD states, ruled by the quark degrees-of-freedom, which is one of the main intrigue in studies of low-energy QCD.

This IFIC Seminar has received funding/support from the GVA Research Project "Understanding non-perturbativie Phenomena in fundamental physics" (PROMETEO/2021/083)

 

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