Conveners
Hadron Spectroscopy: Hadron Spectroscopy
- Alexander Austregesilo (Carnegie Mellon University)
The BESIII has collected 1.3 billion $J/\psi$ and 478 million $\psi$ events from 2009 to 2016 (10 billion $J/\psi$ now). The huge sample provides an ideal platform for light hadron spectroscopy research. In this talk, we shall introduce four recent analyses on light hadron spectroscopy at BESIII. They are related to glueball candidates, e.g. $\eta(1405)$, $f_{0}(1710)$ and $X(1835)$.
In recent years, it is found that many of the newly discovered states cannot easily fit into the naïve quark model. Because some of them are located close to two body thresholds, they have been conjectured as molecular states. We propose that one way to unambitiously test such a picture is going to few body (greater than two) systems while the building blocks are the two body subsystems. The...
Lattice calculations allow us to probe the low-lying, non-perturbative spectrum of QCD
using first principles numerical calculations. Here we present the low-lying spectrum
in the scalar sector with vacuum quantum numbers, including in fully dynamical QCD for
the first time the mixing between glueball, q-qbar, and meson-meson states.
As lattice calculations are necessarily restricted to...
We present measurements of the photon beam asymmetry $\Sigma$ for the reaction $\gamma p\to K^+\Sigma^0$(1193) using the GlueX experiment in Jefferson Lab’s Hall D. Data were collected using a linearly polarized photon beam with energy range 8.2-8.8 GeV incident on a liquid hydrogen target. Asymmetries are measured as functions of Mandelstam variables $t$ and $u$. These are the first exclusive...
