Spectroscopy Overview

Abstract

Present and near-future experiments propose a significant increase in both the quality and scope of data relevant to hadron spectroscopy. The Jefferson Lab 12 GeV experiments GlueX and CLAS12 propose photoproduction of meson systems with mass up to around 3 GeV while the same light hadron systems will be produced through charmonium decays with unprecedented statistics at BES III. States in the charmonium region with a broad set of $J^{PC}$ quantum numbers will be mapped through $\bar{p} p$ annihilation at PANDA, building upon the renaissance in charmonium spectroscopy observed over the past decade. Lattice QCD is increasingly able to suggest phenomenology of direct relevance to these experiments, in particular through exploring quantities that have traditionally been challenging for simple phenomenological models of QCD, such as the presence of gluonic excitations in hadrons and annihilation dynamics in isoscalar mesons. I will present the results of recent calculations of the excited hadron spectrum, which, while currently lacking complete theoretical rigour, do reproduce many of the qualitative features of the observed hadron spectrum while also suggesting novel excited states to be explored experimentally.