$C$ and $CP$ violation in effective field theories and applications to $η$-meson decays
Fuente:
arXiv
Guardado en:
| Autor principal: | |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866917981919903744 |
|---|---|
| author | Kubis, Bastian |
| author_facet | Kubis, Bastian |
| contents | The quest for sources of the simultaneous violation of $C$ and $CP$ symmetry was popular in the 1960s, but has since been neglected for a long time. We revisit the operators that break $C$ and $CP$ for flavor-conserving transitions in both the Standard Model effective field theory and the low-energy effective field theory, which subsequently can be matched to light-meson physics using chiral perturbation theory. As applications, we discuss in particular the $C$-odd Dalitz plot asymmetries in $η\to3π$, but also decays with dilepton pairs in the final state, such as long-distance contributions to the rare semileptonic decays $η\toπ^0\ell^+\ell^-$ as well as asymmetries in $η^{(\prime)} \to γ\ell^+\ell^-$ and $η^{(\prime)} \to π^+π^-\ell^+\ell^-$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_07539 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | $C$ and $CP$ violation in effective field theories and applications to $η$-meson decays Kubis, Bastian High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory The quest for sources of the simultaneous violation of $C$ and $CP$ symmetry was popular in the 1960s, but has since been neglected for a long time. We revisit the operators that break $C$ and $CP$ for flavor-conserving transitions in both the Standard Model effective field theory and the low-energy effective field theory, which subsequently can be matched to light-meson physics using chiral perturbation theory. As applications, we discuss in particular the $C$-odd Dalitz plot asymmetries in $η\to3π$, but also decays with dilepton pairs in the final state, such as long-distance contributions to the rare semileptonic decays $η\toπ^0\ell^+\ell^-$ as well as asymmetries in $η^{(\prime)} \to γ\ell^+\ell^-$ and $η^{(\prime)} \to π^+π^-\ell^+\ell^-$. |
| title | $C$ and $CP$ violation in effective field theories and applications to $η$-meson decays |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2504.07539 |