B → K^* ℓ ℓ Standard Model contributions -- Zooming in on high q²

2016/06/05 by Gudrun Hiller, Hiller, Gudrun
Medicine · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.1606.01474

Prepared for the Moriond EWK 2016 proceedings

arxiv created 2016/06/05 · openalex publication_date 2016/06/05 · arxiv updated 2016/06/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

To further precision studies with B → K^(*) ℓ ℓ decays in the high-q² window uncertainties related to the operator product expansion (OPE) need to be scrutinized. How well can the OPE describe B → K^* (→ K π) ℓ ℓ angular distributions for a given binning in view of the local charm resonance structure? We present a data-driven method to access this quantitatively. Our analysis suggests that the bins which are near the kinematic endpoint are best described by the OPE and should be pursued for precision studies. At the same time measurements with finer binning help controlling the uncertainties.

Related

• B→ K^*ℓ⁺ℓ^- in the Standard Model: Elaborations and Interpretations
• Theoretical Aspects of b → s ℓℓ Decays
• Angular analysis of B⁰ → K^∗(892)⁰ ℓ⁺ ℓ^-
• Data-driven analyses and model-independent fits for present b→ s ℓ ℓ results
• Implications from clean observables for the binned analysis of B -> K*ll at large recoil