25-29 September 2017
Salamanca, Spain
Europe/Zurich timezone

Multiquark states

27 Sep 2017, 11:15
25m
Aula 2.7

Aula 2.7

Talk Exotic states and candidates Exotic states and candidates

Speaker

Alessandro Pilloni (Jefferson Lab)

Description

The observation of the unexpected $XYZ$ resonances has challenged the ordinary heavy quarkonium framework, and their microscopic nature remains an unsettled topic.
We review the status of the multiquark phenomenology, and show how the large prompt production cross-section of the $X(3872)$, compared with the light nuclei production data, disfavors loosely-bound molecules, and calls for other interpretations for the exotic hadron resonances.  
We also show how amplitude analysis can distinguish the possible scenarios of a QCD state, virtual state, or a kinematical enhancement, helping to solve the controversy.

Primary author

Alessandro Pilloni (Jefferson Lab)

Presentation Materials