During the recent US high energy physics strategy process, aka Snowmass, the enthusiasm towards beyond-the-LHC energy frontier has been evident. Several new proposals for next high energy colliders including Higgs factories such as Cool Copper Collider were presented and evaluated together with well-known proposed ILC, CLIC, FCC-ee, CEPC by the Implementation Task Force. This talk will provide a brief overview of the evaluation as well as grand challenges for reaching ultimate colliders.
Join by Zoom: https://ess-eu.zoom.us/j/64966330401?pwd=ZUxjVGF4R3JqMXBlY1pSb3NPVVN6QT09