First measurement of the circular beam asymmetry in the gamma p --> pi0 eta p reaction
V.L.Kashevarov, A.Fix, P.Aguar-Bartolom\'e, L.K.Akasoy, J.R.M.Annand,, H.J.Arends, K.Bantawa, R.Beck, V.Bekrenev, H.Bergh\"auser, A.Braghieri,, D.Branford, W.J.Briscoe, J.Brudvik, S.Cherepnya, R.F.B.Codling, B.T.Demissie,, E.J.Downie, P.Drexler, L.V.Fil'kov, D.I.Glazier
TL;DR
This paper reports the first measurement of the circular beam asymmetry in gamma p to pi0 eta p reactions, providing new insights into resonance contributions in meson photoproduction.
Contribution
It presents the first experimental measurement of circular photon asymmetry in this reaction and interprets results within a phenomenological model to identify resonance effects.
Findings
Confirmed the dominant role of Delta(1700)D33 resonance
Identified small contributions from positive-parity resonances
Validated the phenomenological isobar model
Abstract
The circular photon asymmetry for pi0 eta photoproduction on the proton was measured for the first time at the tagged photon facility of the MAMI C accelerator using the Crystal Ball/TAPS photon spectrometer. The experimental results are interpreted within a phenomenological isobar model that confirms the dominant role of the Delta(1700)D33 resonance. The measured asymmetry allows us to identify small contributions from positive-parity resonances via interference terms with the dominant D33 amplitude.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.