Vector Leptoquark Mediated Leptonic Decay of the Charged $B$-Meson
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866914276407508992 |
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| author | Nadeem, M. Omar Sikandar, Arslan |
| author_facet | Nadeem, M. Omar Sikandar, Arslan |
| contents | We study the purely leptonic decay of the charged $B$-meson within the $U_1$ Vector Leptoquark model at both leading-order and with one-loop QCD corrections. The structure of this amplitude is characterised by direct quark-lepton couplings which allow for lepton flavour universality violation (LFUV) and additional loop-level topologies. The leptoquark channel contributions to the $B$-meson decay constant are computed and accommodated in its lattice-improved uncertainty bounds by constraining the parameter space of this model in two distinct new-physics scenarios. Under these constraints, we provide predictions for both the LFUV and non-LFUV contributions to the branching fractions of this decay. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_06992 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Vector Leptoquark Mediated Leptonic Decay of the Charged $B$-Meson Nadeem, M. Omar Sikandar, Arslan High Energy Physics - Phenomenology We study the purely leptonic decay of the charged $B$-meson within the $U_1$ Vector Leptoquark model at both leading-order and with one-loop QCD corrections. The structure of this amplitude is characterised by direct quark-lepton couplings which allow for lepton flavour universality violation (LFUV) and additional loop-level topologies. The leptoquark channel contributions to the $B$-meson decay constant are computed and accommodated in its lattice-improved uncertainty bounds by constraining the parameter space of this model in two distinct new-physics scenarios. Under these constraints, we provide predictions for both the LFUV and non-LFUV contributions to the branching fractions of this decay. |
| title | Vector Leptoquark Mediated Leptonic Decay of the Charged $B$-Meson |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.06992 |