| Article | |
| Report number | arXiv:2208.04282 ; P3H-22-090 ; SI-HEP-2022-21 ; TTP22-056 ; Nikhef 2022-010 |
| Title | New physics contributions to moments of inclusive b → c semileptonic decays |
| Author(s) | Fael, Matteo (KIT, Karlsruhe, TTP ; CERN) ; Rahimi, Muslem (Siegen U.) ; Vos, K. Keri (Maastricht U. ; Nikhef, Amsterdam) |
| Publication | 2023-02-08 |
| Imprint | 2022-08-08 |
| Number of pages | 29 |
| Note | 28 pages, 7 figures. v2: version published in JHEP; added Appendix B |
| In: | JHEP 02 (2023) 086 |
| DOI | 10.1007/JHEP02(2023)086 |
| Subject category | hep-ph ; Particle Physics - Phenomenology |
| Abstract | Inclusive semileptonic $B\to X_c \ell \bar{\nu}_\ell$ decays, where $\ell = \mu,e$, are by now standard candles in the determination of the CKM element $|V_{cb}|$. These determinations rely on the heavy-quark expansion and use moments of decay spectra to extract the non-perturbative parameters directly from data under the standard model assumption. At the same time, new physics could influence the moments of the inclusive decay. In this paper, we compute power-corrections and next-to-leading order corrections in the strong coupling constant using the full basis of dimension-six new physics operators for the inclusive $B \to X_c \ell \bar{\nu}$ decay. We provide predictions for lepton energy, hadronic and leptonic invariant mass moments, and perform a phenomenological study to show the possible impact of new physics. Our results could be used to perform a global fit including new physics contributions. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2023-2025 The Authors (License: CC-BY-4.0), sponsored by SCOAP³ |
Corresponding record in: Inspire
Registre creat el 2023-02-14, darrera modificació el 2023-08-05
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