Event calendar file
Photoproduction of $\eta$ and $\eta\prime$ with EtaMAID
Speakers
- Lothar TIATOR
Primary authors
- Lothar TIATOR (Institut für Kernphysik, Universität Mainz)
Co-authors
- Prof. Michael OSTRICK (Institut für Kernphysik, Universität Mainz)
- Dr. Viktor KASHEVAROV (Institut für Kernphysik, Universität Mainz)
Abstract content
The isobar model EtaMAID is an online program of the MAID collaboration in Mainz for calculations of observables, amplitudes and multipoles for $\eta$ and $\eta\prime$ photo- and electroproduction on the nucleon. It was introduced in 2001 and updated in 2003. Now we will present a new update EtaMAID2016, taking into account very recent high-precision data of differential cross sections for $p(\gamma,\eta)p$ and $p(\gamma,\eta\prime)p$ from MAMI and polarization observables with beam and target polarization from MAMI, ELSA, JLab and GRAAL. The high-energy region $W>2$ GeV is set-up with Regge trajectories and Regge cuts and can well describe all high-energy data including polarization observables for $\gamma,\pi^0$, $\gamma,\eta$ and $\gamma,\eta\prime$. In the resonance region below $W\approx 2$ GeV we investigated more than 20 $N^*$ resonances and found significant contributions for 18 of them. A very good description has been obtained for all existing photoproduction data.
