Q. An

Abstract: There has recently been a dramatic renewal of interest in hadron spectroscopy and charm physics. This renaissance has been driven in part by the discovery of a plethora of charmonium-like XYZ states at BESIII and B factories, and the observation of an intriguing proton-antiproton threshold enhancement and the possibly related X(1835) meson state at BESIII, as well as the threshold measurements of charm mesons and charm baryons. We present a detailed survey of the important topics in tau-charm physics and hadron physics that can be further explored at BESIII during the remaining operation period of BEPCII. This survey will help in the optimization of the data-taking plan over the coming years, and provides physics motivation for the possible upgrade of BEPCII to higher luminosity.

TL;DR: A detailed survey of the important topics in tau-charm physics and hadron physics that can be further explored at BESIII over the remaining lifetime of BEPCII operation is presented in this article.

TL;DR: In this article, the e(+) e(-) -> pi(+) pi(-) cross section in the energy range between 600 and 900 MeV was extracted by exploiting the method of initial state radiation.

TL;DR: In this article, the BESIII detector at center-of-mass energies between 3.810 GeV and 4.600 GeV was used to study the charmonium-like states and high-excited CHARM states and the time-integrated luminosity of the collected data sample was measured to a precision of 1% by analyzing events produced by the large-angle Bhabha scattering process.

TL;DR: The X(1835), which was previously observed by BESII, is confirmed with a statistical significance that is larger than 20σ, and the angular distribution of the radiative photon is consistent with expectations for a pseudoscalar.