Seminar: Understanding of the LHCb pentaquark states
Title: Understanding of the LHCb pentaquark states as hadronic molecules, from masses, spin-parities to production yields
Speaker: Prof. GENG Lisheng (Beihang University)
Time: 16:30pm, July. 23 (Friday), 2021
Place: Room 218, Building 5
In 2019, the LHCb Collaboration updated their 2015 study, reporting on the discovery of three pentaquark states. In 2020, they reported on the existence of a candidate for hidden charm pentaquark states with strangeness. In this talk, we show that how all these states fit nicely into the molecular picture in a contact range effective field theory where they are bound states of D mesons and singly charmed baryons. In total, we predict the existence of 17 hidden charm pentaquark states with and without strangeness. We further propose some mechanisms in which their molecular nature can be tested either from the existence of triply charmed dibaryons or from the decays where they have been discovered.