4th Workshop on Future Directions in Spectroscopy Analysis (FDSA2022)

Amplitude Analysis of Two-Pseudoscalar Meson Systems at GlueX

Nov 16, 2022, 2:05 PM

35m

Jefferson Lab

Speaker

Alexander Austregesilo (JLab)

Description

The GlueX experiment at Jefferson Lab is studying the light meson spectrum with an emphasis on the search for hybrid mesons. Besides the focus on hybrid meson candidates with exotic quantum numbers, the identification of hybrid mesons with conventional quantum numbers will be essential to confirm the pattern of hybrid multiplets predicted by Lattice QCD calculations and to determine their nature. In this talk, we will focus on the vector meson sector, particularly on the ones decaying into two-pseudoscalar meson final states. Vector mesons contribute to a large fraction of the total photoproduction cross section of the linearly-polarized photon beam at GlueX. The vector meson ground states $\rho$, $\omega$ and $\varphi$ are currently studied with unprecedented precision for valuable input to models of the production process. Beyond that, the GlueX high-precision data set will shed light into the spectrum of excited vector mesons where existing information is limited. This knowledge is necessary to be able to identify potential hybrid meson candidates within the spectrum.

Presentation materials

aaust_FDSA2022.pdf