APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Yosuke Takubo (KEK)
Title: Novel approach to measuring CP violation in B meson decay with application of weak measurement
Date: Wed, Jan 27, 2021, 13:30 - 15:00
Place: Zoom
Abstract: The weak measurement, proposed by Aharonov et al. in 1988, has been applied for various fields of physics for the purpose of prevision
measurement, which is made possible with the help of the “postselection” specifying actively the final state in the physical process. We demonstrated for the first time the feasibility of applying the weak measurement in high energy particle physics, especially in measuring the CP-violating parameters in B meson decays. The postselection can prolong the effective lifetime of the decay mode of B meson statistically and improve sensitivity to the CP-violating parameters. This seminar will introduce process of the weak measurement and present its application for measuring the CP-violating parameters based on Belle II experiment. Finally, future prospect of the weak measurement in high energy physics
will be discussed.