Study of η and η' Photoproduction at MAMI.
| Author | |
|---|---|
| Abstract |
:
The reactions γp→ηp and γp→η^{'}p are measured from their thresholds up to the center-of-mass energy W=1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for η photoproduction at the energies in the vicinity of the η^{'} threshold, W=1896 MeV (E_{γ}=1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η^{'} total cross section from its threshold, can only be explained by a strong coupling of the poorly known N(1895)1/2^{-} state to both ηp and η^{'}p. Including the new high-accuracy results in the ηMAID fit to available η and η^{'} photoproduction data allows the determination of the N(1895)1/2^{-} properties. |
| Year of Publication |
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2017
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| Journal |
:
Physical review letters
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| Volume |
:
118
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| Issue |
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21
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| Number of Pages |
:
212001
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| Date Published |
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2017
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| ISSN Number |
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0031-9007
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| URL |
:
http://link.aps.org/abstract/PRL/v118/p212001
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| DOI |
:
10.1103/PhysRevLett.118.212001
|
| Short Title |
:
Phys Rev Lett
|
| Download citation |
