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HK: Fachverband Physik der Hadronen und Kerne

HK 72: Poster

HK 72.18: Poster

Donnerstag, 14. März 2024, 17:15–18:45, HBR 14: Foyer

An input-output study with diffractive-production pseudo-data for testing of a partial-wave analysis program — •David Spülbeck, Sumin Alff-Kim, Max Hariegel, Henri Pekeler, Mathias Wagner, and Bernhard Ketzer — Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik Universität Bonn

Studying the excitation spectra of hadrons is crutial for gaining a better understanding of the strong interaction in the non-perturbative regime. In order to extract the quantum numbers, resonance parameters, and couplings of bound states formed in a reaction from the angular distributions of the decay products in the final state, a partial-wave analysis is usually performed.

It is important to test the implementation of the complex algorithm. One possible way is an input-output study, which proceeds in the following way: (i) generate pseudo-data from a physics model for a given reaction; (ii) perform a partial-wave analysis on the pseuda-data and compare the result to the input parameters. In the case presented in the poster, we apply this procedure to COMPASS-like diffractive reactions of the kind π⁻+p→ X⁻(→π⁻π⁺π⁻η)+p, with X⁻ as intermediate resonances. The study helps to debug the implementation, but also allows for further systematic studies by changing the fit model, including background processes, etc.

Supported by BMBF.

Keywords: partial-wave analysis; spectroscopy; light mesons