2025/11/17 by Dhiren Panda, Panda, Dhiren, Manas Kumar Mohapatra +3
Physics and Astronomy · #Quantum Chromodynamics and Particle Interactions #Particle physics theoretical and experimental studies #Neutrino Physics Research
paper · pdf · doi:10.48550/arxiv.2511.12958
Quantum coherence plays a crucial role in the dynamics of neutral meson systems, aiding in the extraction of various Standard Model parameters. However, real physical systems always interact with their surroundings, which causes decoherence. In case of time dependent analysis of non-leptonic neutral B meson decays, this decoherence can be modeled using a single parameter, λ. Since decoherence can affect the observed dynamics of flavor oscillations and CP violation, it becomes essential to revisit the key SM parameters such as the CKM angles (α, β, γ) and the mass differences of neutral B mesons (Δmd,s). In this work, we study the CKM phase β as well as the penguin contributions in the Bd0 → J/ψKS decay mode in the presence of decoherence. We employ the pseudo-experiment (Toy Monte-Carlo) technique and perform an SU(3)F analysis using the Bd0 → J/ψπ0 process. Furthermore, we investigate the Bd0 → π+ π- decay mode to understand how the decoherence influences the CP violating observables. Our findings reveal that the presence of decoherence can affect crucially the measured values of the observables.