Volume 336 - XIII Quark Confinement and the Hadron Spectrum (Confinement2018) - B: Light quarks
Review of phenomenological analyses of $\eta^{(\prime)} \pi$ resonances measured at the COMPASS experiment activities and recent results
A. Rodas Bilbao,* A. Pilloni, A. Szczepaniak
*corresponding author
Full text: pdf
Pre-published on: September 12, 2019
Published on: September 26, 2019
Abstract
We present a robust analysis of the $\eta^{(\prime)} \pi$ system in COMPASS data. We fit the extracted relative phases and intensities with a coupled-channel formalism enforcing both unitarity and analyticity.
We provide a robust extraction of a single exotic $\pi_1(1600)$ decaying to both $\eta^{(\prime)} \pi$ final states, and the resonance parameters of the $a_2(1320)$ and $a'_2(1700)$. We find no evidence for a second exotic state, which is compatible with recent Lattice QCD estimates.
DOI: https://doi.org/10.22323/1.336.0091
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access