Prospects of fast timing detectors for particle identification at future Higgs factories

Future $^+^-$ colliders are excellent tools to probe fundamental physics beyond Standard Model via Higgs and electroweak precision measurements.Modern silicon detectors are able to measure time-of-arrival with high precision of O(10 ps). This can be used to measure the time-of-flight (TOF) of the particles and improve their identification.We develop reconstruction and calibration algorithms based on TOF information to separate $\pi^{\pm}$, $K^{\pm}$, $p$, $\bar{p}$ particles in future Higgs factory detectors. Furthermore, we study how to implement fast timing silicon layers in the tracking and/or calorimeter systems, in order to derive requirements on the time resolution. As an example case, the ILD detector concept is studied. The $K^{\pm}$ mass measurement is a simple benchmark to test the performance of TOF algorithm. A precision at the level of 10 keV can be expected, which would significantly improve the knowledge of the $K^{\pm}$ mass