Speaker
Description
We demonstrate how probes of CP-violating observables in Higgs di-tau decays at prospective future lepton colliders could provide a test of weak scale baryogenesis with significant discovery potential. Measurements at the Circular Electron Positron Collider, for example, could exclude a CP phase larger than $2.9^\circ$ ($5.6^\circ$) at 68\% (95\%) C.L. assuming the Standard Model value for the magnitude of the tau lepton Yukawa coupling. Conversely, this sensitivity would allow for a 5$\sigma$ discovery for 82\% of the CP phase range [0,2$\pi$). The reaches of the Future Circular Collider-ee and International Linear Collider are comparable. As a consequence, future lepton colliders could establish the presence of CP violation required by lepton flavored electroweak baryogenesis with at least 3$\sigma$ sensitivity. Our results illustrate that Higgs factories are not just precision machines but can also make $\mathcal O$(1) measurement of the new physics beyond the Standard Model.
| 1st preferred time slot for your oral presentation | 10:00-12:00 JST (3:00-5:00 CEST, 21:00-23:00 EDT, 18:00-20:00 PDT) |
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| 2nd preferred time slot for your oral presentation | 19:00-21:00 JST (12:00-14:00 CEST, 6:00-8:00 EDT, 3:00-5:00 PDT) |
