Contributions from the color-octet matrix elements to the $\overline{B}$ ${\to}$ $ππ$ decays with QCD factorization approach
Fuente:
arXiv
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866916619206262784 |
|---|---|
| author | Yang, Yueling Yang, Bingbing Sun, Junfeng |
| author_facet | Yang, Yueling Yang, Bingbing Sun, Junfeng |
| contents | Motivated by the $ππ$ puzzle in nonleptonic $B$ decays in the time of high-precision and huge-data for particle physics, we restudy the $\overline{B}$ ${\to}$ $ππ$ decays with QCD factorization approach. An additional contributions from the color-octet current matrix elements (COCME) which are unnoticed in almost all the previous calculation, are taken into consideration and parameterized by $X$. It is found that (1) form factor $F_{0}^{Bπ}$ ${\approx}$ $0.22$ is favored by the available latest measurements. (2) The COCME contributions are helpful to interpret the experimental data on branching ratios rather than $CP$ asymmetries for the $\overline{B}$ ${\to}$ $ππ$ decays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_12461 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Contributions from the color-octet matrix elements to the $\overline{B}$ ${\to}$ $ππ$ decays with QCD factorization approach Yang, Yueling Yang, Bingbing Sun, Junfeng High Energy Physics - Phenomenology Motivated by the $ππ$ puzzle in nonleptonic $B$ decays in the time of high-precision and huge-data for particle physics, we restudy the $\overline{B}$ ${\to}$ $ππ$ decays with QCD factorization approach. An additional contributions from the color-octet current matrix elements (COCME) which are unnoticed in almost all the previous calculation, are taken into consideration and parameterized by $X$. It is found that (1) form factor $F_{0}^{Bπ}$ ${\approx}$ $0.22$ is favored by the available latest measurements. (2) The COCME contributions are helpful to interpret the experimental data on branching ratios rather than $CP$ asymmetries for the $\overline{B}$ ${\to}$ $ππ$ decays. |
| title | Contributions from the color-octet matrix elements to the $\overline{B}$ ${\to}$ $ππ$ decays with QCD factorization approach |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2502.12461 |