000001454 001__ 1454
000001454 005__ 20190610075946.0
000001454 037__ $$aBELLE2-TALK-CONF-2019-049
000001454 041__ $$aeng
000001454 088__ $$aBELLE2-TALK-DRAFT-2019-045
000001454 100__ $$aNiharika Rout
000001454 245__ $$aMeasurement of CKM angle phi3 at Belle II
000001454 260__ $$aFPCP 2019$$c2019-05-08
000001454 300__ $$amult. p
000001454 500__ $$a15 min
000001454 520__ $$aThe CKM angle γ is the least well known of the angles of the unitarity triangle and the only one that is accessible with tree-level decays in a theoretically clean way. The Belle II experiment is a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric e+e− collider. The accelerator has already successfully completed the first phase of commissioning with the first electron positron collisions in Belle II recorded in 2018. The design luminosity of SuperKEKB is 8×1035 cm−2s−1 and the Belle II experiment aims to record 50 ab−1 of data, a factor of 50 more than the Belle experiment. The key method to measure γ is through the interference between B+→D0K+ and B+→D¯0K+ decays which occurs if the final state of the charm-meson decay is accessible to both the D0 and D¯0 mesons. To achieve the best sensitivity, a large variety of D and B decay modes is required, which is possible at 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 γ with a precision of 1 degree or better is foreseen. This talk will explain the details of the planned measurement at Belle II and include results related to these measurements obtained with the data already collected.
000001454 8560_ $$fdoris.yangsoo.kim@desy.de
000001454 8564_ $$uhttps://docs.belle2.org/record/1454/files/BELLE2-TALK-CONF-2019-049.pdf