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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2507.22123 |
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| _version_ | 1866908509267820544 |
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| author | Carvunis, Alexandre Finauri, Gael Gambino, Paolo Jung, Martin Mächler, Sandro |
| author_facet | Carvunis, Alexandre Finauri, Gael Gambino, Paolo Jung, Martin Mächler, Sandro |
| contents | We study inclusive semileptonic $\bar{B}\to X_c \ell \barν$ decays ($\ell = e,μ$) in the presence of generic physics Beyond the Standard Model (BSM) that is heavy compared to the $b$-quark mass. Its effect is encoded in the Wilson coefficients of dimension-six operators of the Weak Effective Theory (WET). We compute the resulting BSM contributions to the experimentally measured kinematic moments and the total decay rate through order $\mathcal{O}(Λ_{\rm QCD}^3/m_b^3)$ in the Heavy Quark Expansion, as well as the $\mathcal{O}(α_s)$ corrections for the right-handed vector current. We then perform fits to the full set of available inclusive measurements in several single-mediator scenarios and in the full WET basis. We find qualitatively new bounds in several of these scenarios, complementary to and competitive with constraints from exclusive decays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_22123 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | New Physics in inclusive semileptonic $B$ decays Carvunis, Alexandre Finauri, Gael Gambino, Paolo Jung, Martin Mächler, Sandro High Energy Physics - Phenomenology We study inclusive semileptonic $\bar{B}\to X_c \ell \barν$ decays ($\ell = e,μ$) in the presence of generic physics Beyond the Standard Model (BSM) that is heavy compared to the $b$-quark mass. Its effect is encoded in the Wilson coefficients of dimension-six operators of the Weak Effective Theory (WET). We compute the resulting BSM contributions to the experimentally measured kinematic moments and the total decay rate through order $\mathcal{O}(Λ_{\rm QCD}^3/m_b^3)$ in the Heavy Quark Expansion, as well as the $\mathcal{O}(α_s)$ corrections for the right-handed vector current. We then perform fits to the full set of available inclusive measurements in several single-mediator scenarios and in the full WET basis. We find qualitatively new bounds in several of these scenarios, complementary to and competitive with constraints from exclusive decays. |
| title | New Physics in inclusive semileptonic $B$ decays |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2507.22123 |