| Article | |
| Report number | arXiv:2401.18007 ; CERN-TH-2024-017 |
| Title | Short- vs. long-distance physics in $B\rightarrow K^{(*)} \ell ^+\ell ^-$: a data-driven analysis |
| Author(s) | Bordone, Marzia (CERN) ; isidori, Gino (Zurich U.) ; Mächler, Sandro (Zurich U.) ; Tinari, Arianna (Zurich U.) |
| Publication | 2024-05-31 |
| Imprint | 2024-01-31 |
| Number of pages | 13 |
| In: | Eur. Phys. J. C 84 (2024) 547 |
| DOI | 10.1140/epjc/s10052-024-12869-5 |
| Subject category | hep-ph ; Particle Physics - Phenomenology |
| Abstract | We analyze data on $B\to K\mu^+\mu^-$ and $B\to K^*\mu^+\mu^-$ decays in the whole dilepton invariant mass spectrum with the aim of disentangling short- vs. long-distance contributions. The sizable long-distance amplitudes from $c \bar{c}$ narrow resonances are taken into account by employing a dispersive approach. For each available $q^2=m_{\mu\mu}^2$ bin and each helicity amplitude an independent determination of the Wilson coefficient $C_9$, describing $b\to s\ell^+\ell^-$ transitions at short distances, is obtained. The consistency of the $C_9$ values thus obtained provides an a posteriori check of the absence of additional, sizable, long-distance contributions. The systematic difference of these values from the Standard Model expectation supports the hypothesis of a non-standard $b\to s \mu^+\mu^-$ amplitude of short-distance origin. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2024 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³ |
Corresponding record in: Inspire
Запись создана 2024-02-02, последняя модификация 2024-06-06
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