Distinguishing nonstandard scalar and fermionic charged particles at future $e^{+}{e}^{-}$ collider

Abstract

We investigate the possibility to identify the nature of spin of exotic charged particles at the future $e^{+}{e}^{-}$ collider in $l^{\pm }+2j+MET$ final state choosing IDM and MSSM as examples for the new physics models with scalar and fermionic exotic charged particles, respectively. We choose four benchmarks for the mass parameters for a significant deviation from the SM $W^{+}{W}^{-}$ background. We find that the $\cos \theta$ of $W$ boson constructed from $jj$ pair and lepton have the potential to identify the MSSM signal compared to the IDM signal in longitudinally polarized initial beams. A more robust comparison is seen in the shape of the azimuthal angle of the $W$ boson and charged lepton, which can identify the IDM signal further if the beams are transversely polarized.

Comments: 31 pages, 6 figures and 5 tables