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Jun 10 – 14, 2019
Bonn, Campus Poppelsdorf
Europe/Zurich timezone

η' beam asymmetry at threshold using the BGO-OD experi- ment

Jun 11, 2019, 6:00 PM
HS 5

HS 5

Baryon spectrum through meson photoproduction Parallel Session B


Mr Stefan Alef (Physikalisches Institut, Uni Bonn)


The unexpected nodal structure of the beam asymmetry recently re-
ported by the GRAAL collaboration in η' photoproduction very close
to threshold could be explained by a previously unobserved very nar-
row resonance. Therefor, the measurement is important to be inde-
pendently confirmed.
This possibility is offered by the BGO-OD experiment. It is well suited
for the detection of forward going charged particles which in the thresh-
old region of interest allows the identification of the reaction γp → η'p
solely based on the proton going in forward direction. This yields un-
precedented statistics if in the missing mass analysis of the η' meson
the background can be sufficiently well controlled. A linearly polarized
photon beam produced via coherent bremsstrahlung off a diamond ra-
diator makes it possible to measure the η' beam asymmetry.
In this talk I will present preliminary results on the determination of
the η' beam asymmetry in several energy and angular bins close to
Supported by DFG (PN 50165297).

Primary author

Mr Stefan Alef (Physikalisches Institut, Uni Bonn)

Presentation materials