CP violation and determination of the $bs$ "flat" unitarity triangle at FCCee

Abstract

We investigate the sensitivity with which two angles of the "flat" unitarity triangle, defined by $V_{ub}^{\ast }{V}_{us}+V_{cb}^{\ast }{V}_{cs}+V_{tb}^{\ast }{V}_{ts}=0$, can possibly be measured directly at FCCee. We show that the measured errors on the angle ${\alpha }_s=\arg (-V_{ub}^{\ast }{V}_{us}/V_{tb}^{\ast }{V}_{ts})$ and ${\beta }_s=\arg (-V_{tb}^{\ast }{V}_{ts}/V_{cb}^{\ast }{V}_{cs})$ should be better than $0.4^{\circ }$ and $0.035^{\circ }$, respectively. These measurements, combined with the measurement of the 3rd angle ${\gamma }_s=\arg (-V_{cb}^{\ast }{V}_{cs}/V_{ub}^{\ast }{V}_{us})$, discussed in a different paper, will contribute to probe further the consistency of the CP sector of the Standard Model with unprecedented level of accuracy.

27 pages, 24 figures

Cited by in corpus (1)

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