Measurement of the Transverse Target and Beam-Target Asymmetries in η Meson Photoproduction at MAMI
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PhysRevLett.113.102001.pdf
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Author(s)
Akondi, C. S.
Annand, J. R. M.
Arends, H. J.
Beck, R.
Borisov, N.
Braghieri, A.
Briscoe, W. J.
Cherepnya, S.
Collicott, C.
Costanza, S.
Date Issued
September 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Akondi, C. S., et al. "Measurement of the Transverse Target and Beam-Target Asymmetries in η Meson Photoproduction at MAMI." Phys. Rev. Lett. 113, 102001 (September 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We present new data for the transverse target asymmetry T and the very first data for the beam-target asymmetry F in the [→ over γ][→ over 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.113.102001
