2024/03/27 by R. Aleksan, Aleksan, Roy, L. Oliver +1
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2403.19025
openalex publication_date 2024/03/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
An important experimental effort has been accomplished in recent years in the measurement of rates, polarization and CP observables in B decays into two light vector mesons. On the theoretical side, after a very consistent effort done within the framework of QCD Factorization, the comparison of the theory with the present experimental data has not been updated, to our knowledge. In the present paper we compare this wealth of data to the theory, in tree color-allowed, tree color-suppressed and pure penguin decays, and present predictions for the observables that have not yet been measured in these decays. In our fits we find acceptable values of χ2 for the branching ratios and for the direct CP asymmetries. However, this is not the case for the longitudinal polarization fractions, essentially due to disagreement between theory and experiment for the modes Bd,s→ K*0K*0 and Bd → ρ+ ρ-. Although we rely on previous work by other authors, we summarize the formalism so that the paper is self-contained and its results can be checked.