The role of chiral symmetry and the non-ordinary $κ/K^*_0(700)$ nature in $π^\pm K_S$ femtoscopic correlations
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| author | Albaladejo, Miguel Canoa, Alejandro Nieves, Juan Peláez, Jose Ramón Ruiz-Arriola, Enrique de Elvira, Jacobo Ruiz |
| author_facet | Albaladejo, Miguel Canoa, Alejandro Nieves, Juan Peláez, Jose Ramón Ruiz-Arriola, Enrique de Elvira, Jacobo Ruiz |
| contents | We show that the use of realistic $πK$ interactions, obtained from a dispersive analysis of scattering data, as well as relativistic corrections, are essential to describe recently observed $π^\pm K_S$ femtoscopic correlations. We demonstrate that the spontaneous chiral symmetry breaking dynamics and the non-ordinary features of the $κ/K^*_0(700)$ resonance, together with large cancellations between isospin channels, produce a large suppression of $π^\pm K_S$ femtoscopic correlations compared to widely used models. Within an improved version of the standard on-shell factorization formalism, we illustrate that compensating for this interaction suppression leads to source radii smaller than 1 fm, contrary to usual expectations, as well as larger correlation strengths. The relation between these two parameters cannot be accommodated within naive models describing the nature of the resonances. This may raise concerns about the applicability of popular but too simple approaches for systems with light mesons. However, the correlation-suppression effects we demonstrate here will be relevant in any formalism, and substantial corrections may be expected for other femtoscopic systems involving light mesons. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_19746 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The role of chiral symmetry and the non-ordinary $κ/K^*_0(700)$ nature in $π^\pm K_S$ femtoscopic correlations Albaladejo, Miguel Canoa, Alejandro Nieves, Juan Peláez, Jose Ramón Ruiz-Arriola, Enrique de Elvira, Jacobo Ruiz High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory We show that the use of realistic $πK$ interactions, obtained from a dispersive analysis of scattering data, as well as relativistic corrections, are essential to describe recently observed $π^\pm K_S$ femtoscopic correlations. We demonstrate that the spontaneous chiral symmetry breaking dynamics and the non-ordinary features of the $κ/K^*_0(700)$ resonance, together with large cancellations between isospin channels, produce a large suppression of $π^\pm K_S$ femtoscopic correlations compared to widely used models. Within an improved version of the standard on-shell factorization formalism, we illustrate that compensating for this interaction suppression leads to source radii smaller than 1 fm, contrary to usual expectations, as well as larger correlation strengths. The relation between these two parameters cannot be accommodated within naive models describing the nature of the resonances. This may raise concerns about the applicability of popular but too simple approaches for systems with light mesons. However, the correlation-suppression effects we demonstrate here will be relevant in any formalism, and substantial corrections may be expected for other femtoscopic systems involving light mesons. |
| title | The role of chiral symmetry and the non-ordinary $κ/K^*_0(700)$ nature in $π^\pm K_S$ femtoscopic correlations |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2503.19746 |