000001908 001__ 1908 000001908 005__ 20200422010838.0 000001908 037__ $$aBELLE2-NOTE-PL-2020-004 000001908 041__ $$aeng 000001908 100__ $$aY. Yusa 000001908 245__ $$aReconstruction of B0 -> J/ψKS0 and B+ -> J/ψK+ 000001908 260__ $$a$$c2020-04-21 000001908 300__ $$a3 000001908 520__ $$aIn this public note, we describe the reconstruction of the CP eigenstate of B0-> J/\psi K0S and its control sample of B+ -> J/\psi K+ using the data set taken from the 2019 runs recorded by the Belle II which corresponds to an integrated luminosity of 8.7 /fb. 000001908 6531_ $$aCP-eigenstate 000001908 8560_ $$fyusa.yosuke@desy.de 000001908 8564_ $$uhttps://docs.belle2.org/record/1908/files/BELLE2-NOTE-PL-2020-004.pdf