Event calendar file
7-12 June 2018
Auditorium Maximum
Europe/Warsaw timezone
15th International Workshop on Meson Production, Properties and Interaction
Auditorium Maximum
-
Medium lecture hall (B)
Theoretical analysis of the $\gamma^{(*)}\gamma \to \pi^0 \eta$ process
Speakers
- Oleksandra DEINEKA
Primary authors
- Oleksandra DEINEKA (Institut für Kernphysik & PRISMA Cluster of Excellence, Johannes Gutenberg Universität Mainz)
Co-authors
- Dr. Igor DANILKIN (Institut für Kernphysik & PRISMA Cluster of Excellence, Johannes Gutenberg Universität Mainz)
- Prof. Marc VANDERHAEGHEN (Institut für Kernphysik & PRISMA Cluster of Excellence, Johannes Gutenberg Universität Mainz)
Files
Abstract content
We present a theoretical study of the $\gamma\gamma \to \pi\eta$ process from the threshold up to 1.4 GeV in the $\pi\eta$ invariant mass. For the s-wave $a_0(980)$ resonance state we adopt a dispersive formalism using a coupled-channel Omn`es representation, while the d-wave $a_2(1320)$ state is described as a Breit-Wigner resonance. An analytic continuation to the $a_0(980)$ pole position allows us to extract its two-photon decay width as $\Gamma_{a_0\to\gamma\gamma}=0.27(4)$ keV. [Phys. Rev. D 96, 114018]. As an extension of our work, the preliminary results for the single virtual case will be shown.
