Speaker
Description
In recent years, interest in charmonium spectroscopy has been renewed by
the unexpected discovery of multiple states that seemingly do not fit a conventional
charmonium (ccbar) assigment, the so-called XYZ states. Although there are strong
indications that these states are in fact exotic, there is no consensus on their
exact nature. Therefore, it is of high importance to gather as much information
as possible on the production and decays of the XYZ states.
The BESIII experiment at the Beijing Electron Positron Collider (BEPCII)
collected large dataset in the energy range 4.0 GeV- 4.60 GeV
dedicated to the study of these potentially exotic states in the charm
sector. Vector states, like the Y(4260), can be directly produced in e+e- annihilation
at BESIII; whereas other exotic candidates like the X(3872) and
the Zc(3900) are produced through processes of the type e+e- ->gamma X(3872)
and e+e- ->pi Zc(3900), respectively. Consequently, BESIII is in a unique
position to perform detailed studies on exotic hadrons in the charm
sector.
An overview of recent highlights of the BESIII program on XYZ states
will be given as well as an outlook on future perspectives with an upgraded
BEPCII allowing for higher center-of-mass energies.
| Topic | Hadron Physics |
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