2021/05/25 by Marcel Algueró, Algueró, M., Andreas Crivellin +7
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle Accelerators and Free-Electron Lasers #Particle Detector Development and Performance #Particle physics theoretical and experimental studies
paper · doi:10.48550/arxiv.2105.11837
openalex publication_date 2021/05/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss the anatomy of the LVV observable designed as a ratio of the longitudinal components of Bs → VV versus Bd → VV decays. We focus on the particular case of Bd,s → K*0 K*0 where we find for the SM prediction L_K^* K^*=19.5+9.3-6.8 implying a 2.6σ tension with respect to data. The interpretation of this tension in a model independent way identifies two Wilson coefficients \cal C4 and \cal C8g as possible sources. The example of one simplified model including a Kaluza-Klein (KK) gluon is discussed. This KK gluon embedded inside a composite/extra dimensional model combined with a Z^′ can explain also the b→ sℓℓ anomalies albeit with a significant amount of fine-tuning.