2013/11/15 by Sébastien Descotes–Genon, Sebastien Descotes-Genon, Joaquim Matias +4
Medicine · Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.1311.3876
6 pages, 3 figures, talk presented at The European Physical Society Conference on High Energy Physics -EPS-HEP2013, July 2013, Stockholm, Sweden. One reference added
openalex publication_date 2013/11/15 · arxiv created 2013/11/28 · arxiv updated 2013/12/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We discuss the impact of recent LHCb data on the B -> K* mu+mu- decay for New Physics searches. We use an optimised set of observables with a limited sensitivity to hadronic inputs (form factors), leading to a significant deviation from the Standard Model for the semileptonic operator O9. We ascertain the robustness of our results with respect to models of power corrections, charm-loop effects, factorisation approaches, possible effects from resonance tails at low-recoil, choice of observables and binnings. We explain some contradictory results obtained for the chirality-flipped operator O9prime by different analyses by focusing on the sensitivity of observables at low recoil afflicted by the psi(4160) and possibly other resonances for B+-> K+ mu+mu- and illustrating the need for a finely binned analysis at large recoil (rather than a wide [1-6] bin). Finally, we present updated results including experimental correlations in B -> K* mu+ mu- observables, confirming the deviation seen with respect to the SM hypothesis (4.2 sigma for large-recoil data, 3.5 sigma for large- and low-recoil data).