Exotic Charmonium at BESIII

Abstract

The BESIII Experiment at the Beijing Electron Positron Collider (BEPCII) collected large data samples for electron-positron collisions with center-of-mass above 4 GeV. The analysis of these samples has resulted in a number of surprising discoveries, such as the discoveries of the electrically charged ${\mathrm{Z}}_{\mathrm{c}}$ structures, which, if resonant, cannot be accommodated in the traditional charm quark and anti-charm quark picture of charmonium. In this talk, we will review the current status of the analyses of the exotic states, as well as a number of other interesting features in the new BESIII data samples.

arXiv commentTalk presented at the 2019 Meeting of the Division of Particles and Fields of the American Physical Society (DPF2019), July 29--August 2, 2019, Northeastern University, Boston, C1907293

References in corpus (10)

• Design and Construction of the BESIII Detector
• Observation of a charmonium-like enhancement in the gamma gamma --> omega J/psi process
• $Y(4260)$ as the first $S$-wave open charm vector molecular state?
• Study of $e^{+}{e}^{-}\to \gamma \omega J/\psi$ and Observation of $X(3872)\to \omega J/\psi$
• Cross section measurements of $e^{+}{e}^{-}\to \omega {\chi }_{c0}$ from $\sqrt{s}=$4.178 to 4.278 GeV
• Pionic transitions from X(3872) to chi_{cJ}
• Observation of the decay $X(3872)\to {\pi }^0{\chi }_{c1}(1P)$
• Probing the nature of Z_c states via the eta_c rho decay
• Determination of the absolute branching fractions of X(3872) decays
• Deciphering the XYZ States