Work

Low-energy $K^+N$ scattering revisited and in-medium strange quark condensate

Year: 2025

Type: conference-paper

Abstract: The chiral ward identity connects the in-medium quark condensate to the soft limit value of a correlation function of the pseudoscalar fields evaluated in nuclear medium. For the strange quark condensate, one considers the correlation function of the pseudoscalar fields with strangeness. The correlation function describes in-medium propagation of kaons and it is obtained phenomenologically by kaon-nucleon scattering in the low density approximation. We describe the kaon-nucleon scattering amplitude in chiral perturbation theory and its low energy constants are determined by existent $K^{+}N$ scattering data. Performing analytic continuation of the scattering amplitude obtained by chiral perturbation theory, we can take the soft limit of the scattering amplitude. With this amplitude, we evaluate the in-medium strange quark condensate based on hadron phenomenology.

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

DOI: 10.22323/1.465.0210

Authors: Daisuke Jido, Yutaro Iizawa, Stephan Hübsch

Institution: Institute of Science Tokyo

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

Funder: Japan Society for the Promotion of Science

Awards: Toward revolutionary Nuclear Study via revealing Internal Structure of Kaonic Nuclei, Novel Quark Model for Multi-Quark Systems, In-medium properties of K meson and partial restoration of chiral symmetry