Cascade topologies in rare charm decays and implications for CP violation
Fuente:
arXiv
Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908296415281152 |
|---|---|
| author | Solomonidi, Eleftheria |
| author_facet | Solomonidi, Eleftheria |
| contents | The CP violation observed in the hadronic decays of charmed mesons remains a puzzling open question for theorists. Calculations relying on the assumption of inelastic final-state interactions occurring between the pairs of pions and kaons fall short of the experimental value. It has been pointed out that a third channel of four pions can leave imprints on the CP asymmetries of the two-body decays. At the same time, plenty of data are available for the $4π$ decays of charmed mesons, as well as for the rare decays $D^0\toπ^+π^-\ell^+\ell^-$. With this motivation, we study the cascade topology $D^0\to a_1(1260)^+(\to ρ(770)^0π^+)\,π^-$, which has been measured to contribute significantly to the $4π$ decays, and estimate its effect on the branching ratio of the rare decays. We also explore the possibility of this topology contributing to the decay amplitude of $D^0\toπ^+π^-$ and by extension to the related CP asymmetry. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_01517 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cascade topologies in rare charm decays and implications for CP violation Solomonidi, Eleftheria High Energy Physics - Phenomenology The CP violation observed in the hadronic decays of charmed mesons remains a puzzling open question for theorists. Calculations relying on the assumption of inelastic final-state interactions occurring between the pairs of pions and kaons fall short of the experimental value. It has been pointed out that a third channel of four pions can leave imprints on the CP asymmetries of the two-body decays. At the same time, plenty of data are available for the $4π$ decays of charmed mesons, as well as for the rare decays $D^0\toπ^+π^-\ell^+\ell^-$. With this motivation, we study the cascade topology $D^0\to a_1(1260)^+(\to ρ(770)^0π^+)\,π^-$, which has been measured to contribute significantly to the $4π$ decays, and estimate its effect on the branching ratio of the rare decays. We also explore the possibility of this topology contributing to the decay amplitude of $D^0\toπ^+π^-$ and by extension to the related CP asymmetry. |
| title | Cascade topologies in rare charm decays and implications for CP violation |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2504.01517 |