2025/03/31 by Ulrich Nierste, Nierste, Ulrich
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2504.00157
openalex publication_date 2025/03/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
I present a consistent way to include η-η^′ mixing in global analyses of two-body decays of heavy hadrons employing the approximate flavour-SU(3) symmetry of QCD. The framework is applied to D→ P η^′ decays, where P denotes a pseudoscalar meson. The result shows that flavour-SU(3) symmetry holds in the decay rates of these modes to better than 30%. With future data we expect the branching ratios of Ds→ K+ η^′ and D → K+η^′ to move upward and downward by ∼ 1σ, respectively. Subsequently I discuss the implications of the LHCb measurements of the CP asymmetries in D→ K+K- and D→ π+π- for generic scenarios of new physics. New-physics contributions should have imprints on other CP asymmetries as well and can be tested through sum rules. Promising decays are Ds+→ K0π+, D+→ K0K+, D0→ K0 K*0, D0→ K0 K*0, Ds+→ K*0π+, and D+→ K*0K+.