Correction to $CP$-asymmetry in $Υ(4S)$ decays due to the admixture of $B^0 \bar B^0$ in a $C$-even state
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866914163026034688 |
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| author | Panchenko, N. A. Godunov, S. I. |
| author_facet | Panchenko, N. A. Godunov, S. I. |
| contents | $BB$ pairs from $Υ(4S)\to BB$ decays are in $C$-odd state. However, there is a small admixture of the $C$-even state and it modifies the time dependent $CP$-asymmetry. The $C$-even component appears due to soft photon emission, breaking the pure $C$-odd nature of the initial state. Using the two-particle wave function formalism, we derive analytical expressions for $CP$-asymmetry in both pure and mixed $C$-parity states. We emphasize the strong energy dependence of the admixture magnitude. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_14384 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Correction to $CP$-asymmetry in $Υ(4S)$ decays due to the admixture of $B^0 \bar B^0$ in a $C$-even state Panchenko, N. A. Godunov, S. I. High Energy Physics - Phenomenology High Energy Physics - Experiment $BB$ pairs from $Υ(4S)\to BB$ decays are in $C$-odd state. However, there is a small admixture of the $C$-even state and it modifies the time dependent $CP$-asymmetry. The $C$-even component appears due to soft photon emission, breaking the pure $C$-odd nature of the initial state. Using the two-particle wave function formalism, we derive analytical expressions for $CP$-asymmetry in both pure and mixed $C$-parity states. We emphasize the strong energy dependence of the admixture magnitude. |
| title | Correction to $CP$-asymmetry in $Υ(4S)$ decays due to the admixture of $B^0 \bar B^0$ in a $C$-even state |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2511.14384 |