1. Measurement of the Transverse Target and Beam-Target Asymmetries in η Meson Photoproduction at MAMI.
- Author
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Akondi, C. S., Annand, J. R. M., Arends, H. J., Beck, R., Bernstein, A., Borisov, N., Braghieri, A., Briscoe, W. J., Cherepnya, S., Collicott, C., Costanza, S., Downie, E. J., Dieterle, M., Fix, A., Fil'kov, L. V., Garni, S., Glazier, D. I., Gradl, W., Gurevich, G., and Hall Barrientos, P.
- Subjects
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MESONS , *MICROTRONS , *SPECIAL relativity (Physics) , *RESEARCH institutes - Abstract
We present new data for the transverse target asymmetry T and the very first data for the beam-target asymmetry F in the y p → ηp 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 η meson photoproduction. The peculiar nodal structure observed in existing T data close to threshold is not confirmed. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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