## On the $η$ and $η’$ Photoproduction Beam Asymmetry at High Energies

We show that, in the Regge limit, beam asymmetries in $η$ and $η’$ photoproduction are sensitive to hidden strangeness components. Under reasonable assumptions about the couplings we estimate the contribution of the ϕ Regge pole, which is expected to be the dominant hidden strangeness contribution. The ratio of the asymmetries in $η’$ and $η$ production is estimated to be close to unity in the forward region 0 < $-t$ / GeV$^2$ ≤ 1 at the photon energy E$_{lab}$ = 9 GeV , relevant for the upcoming measurements at Jefferson Lab.

Publication Date:
Nov 10 2017
Date Submitted:
Aug 10 2018
Pagination:
362-367
ISSN:
1873-2445
Citation:
Physics Letters B
B774
Note:
A freely accessible, full text version is available using the link(s) in External Resources.
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Record created 2018-08-10, last modified 2019-04-03

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