Data-driven analyses and model-independent fits for present $b\to s \ell \ell$ results
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866914202009993216 |
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| author | Hurth, T. Mahmoudi, F. Monceaux, Y. Neshatpour, S. |
| author_facet | Hurth, T. Mahmoudi, F. Monceaux, Y. Neshatpour, S. |
| contents | We present a critical assessment of the present $B$ anomalies in the exclusive $b \to s \ell\ell$ mode based on the QCD factorisation (QCDf) approach. In particular, we analyse the impact of different local form factor calculations and of the largest bin in the low-$q^2$ region. We also present a model-independent analysis of the new results of the LHCb and CMS experiments on the $B \to K^* μ^+μ^-$ angular observables. In addition, we update the global fit by including all $b \to s$ observables incorporating the new data from CMS and LHCb. In these analyses, we use 10% or higher guesstimates of the non-factorisable power corrections as additional uncertainties, serving as a placeholder for robust estimates of these contributions. Updating earlier results, we also analyse the combined LHCb and CMS data on the $B \to K^* μ^+μ^-$ angular observables using data-driven approaches to find indications whether these tensions between the QCDf predictions and the present data are due to underestimated subleading hadronic contributions or due to new physics effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_09986 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Data-driven analyses and model-independent fits for present $b\to s \ell \ell$ results Hurth, T. Mahmoudi, F. Monceaux, Y. Neshatpour, S. High Energy Physics - Phenomenology We present a critical assessment of the present $B$ anomalies in the exclusive $b \to s \ell\ell$ mode based on the QCD factorisation (QCDf) approach. In particular, we analyse the impact of different local form factor calculations and of the largest bin in the low-$q^2$ region. We also present a model-independent analysis of the new results of the LHCb and CMS experiments on the $B \to K^* μ^+μ^-$ angular observables. In addition, we update the global fit by including all $b \to s$ observables incorporating the new data from CMS and LHCb. In these analyses, we use 10% or higher guesstimates of the non-factorisable power corrections as additional uncertainties, serving as a placeholder for robust estimates of these contributions. Updating earlier results, we also analyse the combined LHCb and CMS data on the $B \to K^* μ^+μ^-$ angular observables using data-driven approaches to find indications whether these tensions between the QCDf predictions and the present data are due to underestimated subleading hadronic contributions or due to new physics effects. |
| title | Data-driven analyses and model-independent fits for present $b\to s \ell \ell$ results |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2508.09986 |