Measurements of B⁰→ J/ψπ⁰ and other CP violating modes at Belle

2018/11/12 by Bilas Pal, Pal, Bilas
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Computational Physics and Python Applications #Quantum Chromodynamics and Particle Interactions

paper · doi:10.48550/arxiv.1811.04993

Abstract

We report the recent measurements of B⁰→ J/ψπ⁰ and other CP violation modes based on the data collected by the Belle experiment at the KEKB collider. The CP asymmetry parameters for the decay B⁰→ J/ψπ⁰ have previously been measured by BaBar and Belle experiments, but the results of mixing induced CP asymmetry [S=-η_fsin(2ϕ₁)] were not in good agreement with each other. Furthermore, the BaBar result lies outside the physically allowed region. Previous Belle measurements were based on 535×10⁶ BB pairs. We updated the measurements using the final Belle data set of 772×10⁶ BB pairs. The CP asymmetry parameters from a charmless B⁰→ K_S⁰π⁰π⁰ decay using final Belle data set and measurement of cos(2ϕ₁) in B⁰→ D^(*)h⁰ using joint BaBar and Belle analysis are also discussed.

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