Roberto Mussa

10 October 2023
42nd International Symposium on Physics in Collision

Abstract: Since the discovery of X(3872), Belle has been pioneering the exploration of tetraquarks, QCD bound states beyond standard mesons and baryons. More than a decade after the end of data taking, the Belle datasets are still producing results in hadron spectroscopy, and have provided the motivations for the first energy scan above the energy of the peak, between 10.65 GeV and 10.81 GeV, taken by Belle II in November 2022. This talk will present recent results on searches for the hidden bottom transitions between Y(10750) and lower bottomonia, and measurements of the energy dependence of the e+e- to B(*)B(*)bar cross section. In addition, we will show results of a search for resonant double charmonium bound states, done with Belle data, which gives insights on our future opportunities on this topic.