Phenomenology of isospin-symmetry breaking with vector mesons
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909066612178944 |
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| author | Kovács, Péter Wolf, György Weickgenannt, Nora Rischke, Dirk H. |
| author_facet | Kovács, Péter Wolf, György Weickgenannt, Nora Rischke, Dirk H. |
| contents | We study the effect of isospin-symmetry breaking in the framework of the extended Linear Sigma Model (eLSM) in vacuum. In this model, several particles mix with each other at tree level, due to the three non-zero scalar condensates (non-strange, strange, isospin). We resolve these mixings with the help of various field transformations. We compute all possible meson mixings and decay widths at tree level and perform a $χ^2$ fit to PDG data. A very good fit is found if we exclude the (very small $\sim 130$~keV) $ω\to ππ$ decay. We also investigate the violation of Dashen's theorem. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_04527 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Phenomenology of isospin-symmetry breaking with vector mesons Kovács, Péter Wolf, György Weickgenannt, Nora Rischke, Dirk H. High Energy Physics - Phenomenology We study the effect of isospin-symmetry breaking in the framework of the extended Linear Sigma Model (eLSM) in vacuum. In this model, several particles mix with each other at tree level, due to the three non-zero scalar condensates (non-strange, strange, isospin). We resolve these mixings with the help of various field transformations. We compute all possible meson mixings and decay widths at tree level and perform a $χ^2$ fit to PDG data. A very good fit is found if we exclude the (very small $\sim 130$~keV) $ω\to ππ$ decay. We also investigate the violation of Dashen's theorem. |
| title | Phenomenology of isospin-symmetry breaking with vector mesons |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.04527 |