Abstract:
Recently the LHCb experiment has observed the Tcc+ tetraquark state of exceptional properties. It decays into DD* final state, which suggests a quark content of [cc anti-u anti-d]. The Tcc+ particle is manifestly exotic, however, contrary to other unconventional states observed so far, it is long-lived. I will present the discovery measurement and following studies that shed some light on the Tcc+ nature.
Important: This seminar is held in building D-11 room 104.
Please, be advised that due to the pandemic sanitary rules, we can absorbe 1 unvaccinated person per 10m^2, which means 4 people. As most of us are vaccinated, this should not be a problem. There will be a list of participants, stating that they were (or were not) vaccinated / are immune / with a valid covid test, where we will ask you to sign in upon arrival. Also, people with ANY symptoms of cold (either of running nose, cough, temperature, ...), not necessarily covid, are not allowed to participate according to the rules. We hope you understand. The situation is dynamic and we will of course keep you posted. At the moment we plan to proceed “live”, similary to teaching at AGH.