arXiv subjects

Philipp Kroenert

Publications and source records attributed to Philipp Kroenert.

2 recordsLinked to original sources

arXiv2024

Truncated Partial-Wave Analysis for $η$-photoproduction observables via Bayesian Statistics

A truncated partial-wave analysis is performed for $η$-photoproduction using the polarization observables $σ_0, Σ, T, E, F$ and $G$. Different truncation orders are analyzed for six energy bins within the range of $E^{lab}_γ \in [750, 1250]$ MeV. Bayesian statistics is combined with truncated partial-wave analysis for the first time to investigate the structure of emerging ambiguities and their relevance in comparison to each other. Marginal distributions for the electromagnetic multipole parameters are presented together with predictions for polarization observables which have not yet been measured, in order to determine promising future measurements able to remove remaining mathematical ambiguities.

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arXiv2020

Minimal complete sets for two pseudoscalar meson photoproduction

For photoproduction reactions with final states consisting of two pseudoscalar mesons and a spin-1/2 baryon, 8 complex amplitudes need to be determined uniquely. A modified version of Moravcsik's theorem is employed for these reactions, resulting in slightly over-complete sets of polarization observables that are able to determine the amplitudes uniquely. Further steps were taken to reduce the found sets to minimal complete sets. As a final result, multiple minimal complete sets without any remaining ambiguities are presented for the first time. These sets consist of $2N=16$ observables, containing only one triple polarization observable.

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