Interpreting the results on exclusive $c\rightarrow sμν$ modes
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866915893171191808 |
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| author | Bečirević, D. Martines, M. Rosauro-Alcaraz, S. Sumensari, O. |
| author_facet | Bečirević, D. Martines, M. Rosauro-Alcaraz, S. Sumensari, O. |
| contents | We examine the $q^2$-binned distributions of the $D\to Kμν$ decay rate and of the corresponding forward-backward asymmetry which were recently measured by BESIII, showing a mild deviation from the Standard Model predictions. We point out that the proposed solution to remedy the discrepancy by turning on a complex-valued New Physics coupling is in tension with the constraints deduced from the LHC bounds on the high-$p_T$ tail of the relevant Drell-Yan process. We then show that there are several plausible scenarios that are compatible with both the measured low-energy and high-energy constraints but the selected couplings appear to be too small to be observed in the measurements of integrated observables, except for possibly the $q^2$-binned distribution of the angular observables relevant to $D_s\to ϕ(\to KK) μν$ or $Λ_c\to Λ(\to p π) μν$ modes. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_25837 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Interpreting the results on exclusive $c\rightarrow sμν$ modes Bečirević, D. Martines, M. Rosauro-Alcaraz, S. Sumensari, O. High Energy Physics - Phenomenology We examine the $q^2$-binned distributions of the $D\to Kμν$ decay rate and of the corresponding forward-backward asymmetry which were recently measured by BESIII, showing a mild deviation from the Standard Model predictions. We point out that the proposed solution to remedy the discrepancy by turning on a complex-valued New Physics coupling is in tension with the constraints deduced from the LHC bounds on the high-$p_T$ tail of the relevant Drell-Yan process. We then show that there are several plausible scenarios that are compatible with both the measured low-energy and high-energy constraints but the selected couplings appear to be too small to be observed in the measurements of integrated observables, except for possibly the $q^2$-binned distribution of the angular observables relevant to $D_s\to ϕ(\to KK) μν$ or $Λ_c\to Λ(\to p π) μν$ modes. |
| title | Interpreting the results on exclusive $c\rightarrow sμν$ modes |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.25837 |