We present new data for the transverse target asymmetry T and the very first data for the beam-target asymmetry F in the (gamma) over right arrow (p) over right arrow -> eta p reaction up to a center-of-mass energy of W = 1.9 GeV. The data were obtained with the Crystal-Ball/ TAPS detector setup at the Glasgow tagged photon facility of the Mainz Microtron MAMI. All existing model predictions fail to reproduce the new data indicating a significant impact on our understanding of the underlying dynamics of eta meson photoproduction. The peculiar nodal structure observed in existing T data close to threshold is not confirmed.
- TAGGED PHOTON SPECTROMETER