Nonfactorizable charming loops in exclusive FCNC $B$ 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_ | 1866911617592066048 |
|---|---|
| author | Melikhov, Dmitri |
| author_facet | Melikhov, Dmitri |
| contents | We compare (i) nonfactorizable charm-quark loops in exclusive FCNC B-decays and (ii) three-particle contributions to the amplitude of semileptonic B-decay. Both amplitudes are given in the heavy-quark limit, $m_b\to\infty$, by a convolution of a hard kernel and a three-particle wave function of the $B$-meson, $\langle 0|\bar q(x)G_{μν}(z) b(0)|B(p)\rangle$. An essential difference between the two amplitudes is that the amplitude of semileptonic $B$-decay involves this 3-particle wave function in a collinear light-cone configuration, whereas the amplitude of nonfactorizable charm in FCNC $B$-decays involves this 3-particle wave function in a double collinear light-cone configuration. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_07261 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nonfactorizable charming loops in exclusive FCNC $B$ decays Melikhov, Dmitri High Energy Physics - Phenomenology We compare (i) nonfactorizable charm-quark loops in exclusive FCNC B-decays and (ii) three-particle contributions to the amplitude of semileptonic B-decay. Both amplitudes are given in the heavy-quark limit, $m_b\to\infty$, by a convolution of a hard kernel and a three-particle wave function of the $B$-meson, $\langle 0|\bar q(x)G_{μν}(z) b(0)|B(p)\rangle$. An essential difference between the two amplitudes is that the amplitude of semileptonic $B$-decay involves this 3-particle wave function in a collinear light-cone configuration, whereas the amplitude of nonfactorizable charm in FCNC $B$-decays involves this 3-particle wave function in a double collinear light-cone configuration. |
| title | Nonfactorizable charming loops in exclusive FCNC $B$ decays |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2508.07261 |