Speaker
Description
The Z-pole operation at FCC-ee presents an unprecedented opportunity for heavy flavor physics, as the production of $5 \times 10^{12}$ Z bosons will result in about $8 \times 10^{11}$ b-quark pairs. Among all species of B hadrons produced at FCC-ee, the purely leptonic decays of the $B^+_c$ and $B^+$ mesons are the cleanest experimental probes to measure the off-diagonal CKM elements $|V_{cb}|$ and $|V_{ub}|$, and are highly sensitive to test BSM models such as charged Higgs bosons and leptoquarks. A complete feasibility study of the $B^+_c$ to $\tau^+ \nu_{\tau}$ measurement at FCC-ee is performed and its phenomenological impact on various new physics scenario is explored. Recent develops has also been made on the measurement of the $B^+$ to $\tau^+ \nu_{\tau}$ decay, demonstrating the feasibility of this measurement with a precision comparable to that of $B^+_c$. This set of work also showcases the FCC-ee analysis workflow fully based on common software tools from EDM4hep through to final analysis.
