2024/11/03 by Arianna Tinari, Tinari, Arianna
Mathematics · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Quantum chaos and dynamical systems #Stochastic processes and statistical mechanics #Theoretical and Computational Physics
paper · pdf · doi:10.48550/arxiv.2411.01622
openalex publication_date 2024/11/03 · openalex created_date 2024/11/14 · openalex updated_date 2026/07/28
The tension of B→ K(*)ℓℓ decays with the Standard Model (SM) can be attributed to a short-distance (SD) b sℓℓ interaction. We show two methods to disentangle this effect from long-distance (LD) dynamics. Firstly, we perform a comparison of the inclusive b→ sℓℓ rate at high q2=m2ℓℓ≥ 15~\rm GeV2 with a determination based on data on the leading exclusive modes, finding a ∼ 2σ discrepancy. Secondly, we analyze the exclusive B→ K(*)ℓℓ spectrum in the entire q2 region. With a dispersive parametrization of the charmonia resonances, we extract the non-SM contribution to the Wilson coefficient C9 for every bin in q2. The result is compatible with the SD hypothesis and the inclusive determination. Finally, with the aim of having better control over LD effects that mimic the C9 contribution, we estimate the size of a few charm-rescattering processes in B→ Kℓℓ.