Session S02: Exotic Hadrons from the LHC and B-Factories

Heavy Exotics: Concepts, Insights and Perspectives

In the past decade, lots of hadrons were discovered especially in the heavy quarkonium mass ranges that cannot fit into the level scheme provided by the traditional quark models. In the talk I will review some of the most popular proposals for the nature of these so-called XYZ states, including hadronic molecules, hadro-quarkonia and tetraquarks, as well as the non-trivial predictions that can be derived from them. Based on these together with the experimental prospects it is fair to expect significant progress towards a deeper understanding of the XYZ states in the near future.   

Mitsuyoshi Tanaka Dissertation Award Talk: Exotic states in B decays

Since the Quark Model came into being in the 1960's, it has been enormously successful in classifying the known hadrons. These hadrons have historically fallen neatly into the categories of three-quark baryons or quark-antiquark mesons. Yet even since the existence of quarks was first proposed, it has been suggested that they could be arranged into other configurations, such as two quarks and two antiquarks (tetraquarks), or four quarks and an antiquark (pentaquarks). There is no known reason why such ``exotic'' combinations of quarks such as these should not exist, and indeed in recent years a number of strong tetraquark candidates have been found. These were followed by two pentaquark candidates, $P_{c}(4380)$ and $P_{c}(4450)$, whose findings made up the bulk of the work for which this Tanaka Dissertation Award was given. An overview of this work will be given, followed by a review of recent LHCb results in the field of exotic hadrons.   

Exotic states in e+e- collisions (Belle and BESIII)

We present recent results on exotic states in e+e- collisions. This review covers new results from Belle and BESIII Collaborations and discussion of perspectives for future experiments such as Belle-II.