The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substantial upgrade of the $B$ factory facility at the Japanese KEK laboratory. Since the year 2019, Belle II has recorded close to 600 fb$^{-1}$ at the center-of-mass energy of the $\Upsilon(4S)$ resonance. Together with the Belle data set, this is by far the world-largest sample of electron positron collision...
Electron-positron collider experiments, such as BESIII and Belle (II), along with future facilities like the Super Tau-Charm Factory (STCF), will serve as improtant laboratories for studying charm physics. BESIII operates near the threshold energy region, where it collects substantial data samples of charmed and anti-charmed hadron pairs. The proposed STCF aims to be a third-generation...
The electron-positron Higgs factory is regarded as the highest priority future collider, as it could use the Higgs boson as a portal to the new physics principles underneath the Standard Model , which then could shed light on the long-standing critical problems such as the matter origin, the origin of dark matter, et.al.
A typical electron-positron Higgs factory will likely deliver...
The talk will review prospects of precision EW and QCD studies at $e^+e^-$ collider experiments at the Z-pole and beyond including FCC-ee, CEPC, ILC and CLIC.
Focus will be made on observables used for the electro-weak fits and basic QCD studies such as strong coupling constant, event shapes and jets. A short introduction on theoretical aspects will be given, together with the...
Experiments at e+e- colliders have historically been succesful in the discovery of new particles. During the last 20-30 years many flavor factories operated at energies from 1 GeV to slightly above 10 GeV. This range is particularly suited to search for the existence of a light dark sector. I will present results from recent searches, especially from the Belle II experiment, for dark photons,...
