000001150 001__ 1150
000001150 005__ 20180930164333.0
000001150 037__ $$aBELLE2-CONF-PROC-2018-018
000001150 041__ $$aeng
000001150 100__ $$aPrasanth Krishnan
000001150 245__ $$aPrecision measurements of the CKM parameters (mainly γ/φ3 measurements)
000001150 260__ $$a$$c2018-09-30
000001150 300__ $$a7
000001150 500__ $$aFPCP 2018 proceedings
000001150 520__ $$aThe CKM angle γ/φ3 is the only one that is accessible with tree level decays in a theoretically clean way such that it provides a precision test of CP violation in the standard model. The Belle II experiment is a substantial upgrade of the Belle detector and will operate at the SuperKEKB asymmetric-energy e+e- collider. The accelerator has already successfully completed the first phase of commissioning in 2016 and first e+ e- collisions in Belle II happened during April 2018. The design luminosity of SuperKEKB is 8 × 10^35 cm ^-2 s^-1 and the Belle II experimentaims to record 50 ab^-1 of data, a factor of 50 more than its predecessor (Belle). The key method to measure φ3 is through interference between the B^+ → D0 K^+ and B^+ → D0bar K^+ decays which occurs if the final state of the charm-meson decay is accessible to both the D0 and D0bar mesons. To achieve the best sensitivity, a large variety of D and B decay modes are required, which is possible at the Belle II experiment as almost any final state can be reconstructed including those with photons. With the ultimate Belle II data sample of 50 ab^-1, a determination of φ3 with a precision of 1 degree or better is foreseen. We explain herein the details of the planned measurements at Belle II.
000001150 6531_ $$aCKM matrix
000001150 6531_ $$aγ
000001150 6531_ $$aφ3
000001150 6531_ $$aBelle II
000001150 8560_ $$fprasanth.krishnan@desy.de
000001150 8564_ $$uhttps://docs.belle2.org/record/1150/files/BELLE2-CONF-PROC-2018-018.pdf