Particle Physics Seminar: Measurement of charm-mixing parameter yCP in D0→ KSω decays at Belle

Zoom: https://us02web.zoom.us/j/83283854432?pwd=VXdmZ1lTbkl4SEZnVndqcUZNQWg0UT09&from=msft

Abstract:

Within the Standard Model, CP-violation in the charm system is very small, making it a good probe for new physics. The observable y_CPparameterizes charm-mixing in D⁰ decays to CP-eigenstates and is sensitive to  CP-violation in the charm system. The current world average value of y_CP  is (0.715 ± 0.111)%, where the precision mostly comes from CP-even decays of D⁰. It includes a measurement from CP-odd final state, K_Sφ, in an analysis that assumes no CP-violation, using the full Belle dataset. I will present the first measurement of y_CP in the CP-odd decay D⁰→ K_Sω, allowing for CP-violation. This analysis is published recently at Phys. Rev. D 102, 071102(R). I would also discuss the Belle II prospects of y_CP from CP-odd decays.

Seminar Organizers: Prof. Erez Etzion & Dr. Liron Barak