Speaker
Dr
Pengxuan Zhu
(ITP, CAS)
Description
The proposed CEPC serves as a Higgs factory and provides a unique opportunity to explore new physics related to dark matter. We present a set of Lorentz invariant kinematic variables that effectively reconstruct the mass of semi-invisible decaying particle pairs at lepton colliders, enhancing the signal's statistical significance. Applying these variables to smuon pair production at a 240 GeV lepton collider with 5 ab$^{-1}$ of integrated luminosity, we establish exclusion and discovery limits beyond $\sqrt(s)/2$, extending into the off-shell region. Additionally, these variables improve the precision of W-boson mass measurements by approximately 2-3 MeV in the full leptonic decay channel.
Primary authors
Jin Min Yang
(ITP, Beijing)
Dr
Pengxuan Zhu
(ITP, CAS)
Rui Zhu
(Institute of Theoretical Physics, Chinese Academy of Sciences)
Yang Zhang
(Zhengzhou University)
