Work

Improving $\pi\pi$ dispersive analyses and resonance determination with Forward Dispersion Relations

Year: 2025

Type: conference-paper

Abstract: We present preliminary results of an improved pion-pion scattering dispersive analysis that includes: a refined treatment of inelasticities, the introduction of G-waves, the extension of Forward Dispersion Relations as constraints up to 1.6 GeV, and data description up to roughly 1.8 GeV. Additionally, we impose Roy-like dispersion relations. As a result, we obtain three reliable solutions corresponding to three different datasets. From the Forward Dispersion Relation output, we extract resonance pole parameters in a parameterization-independent way using continued fractions.

Source: International Conference on Quarks and Nuclear Physics (QNP)

DOI: 10.22323/1.465.0028

Authors: Pablo Rabán Mondéjar, José Ramón Peláez Sagredo, Jacobo Ruiz de Elvira

Institution: Universidad Complutense de Madrid

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: European Commission, Agencia Estatal de Investigación