RIKEN seminar

"Weak Value and CP Violation Measurement"

Presented by Yuichiro Mori, KEK

Thursday, January 21, 2021, 9:00 am — Webcast

Abstract: The weak value, proposed by Aharonov et al. in 1988, has been applied for various fields of physics for the purpose of precision measurement, which is made possible with the help of the 'postselection'
specifying actively the final state in the physical process. Here we have considered the feasibility of applying the weak measurement in high energy particle physics, especially in measuring the CP-violating parameters in B meson decays, where the effective lifetime of the decay mode is expected to be prolonged statistically due to the postselection.
Our analysis shows that, when adopted in the Belle II experiment at the SuperKEKB collider, the effective lifetime may be prolonged up to 2.6 times, and that the measurement precision of the CP-violating parameters may be improved by about 20%.

Hosted by: Akio Tomiya

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