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An indirect probe of higgsino world at the CEPC (1705.02534v2)

Published 6 May 2017 in hep-ph and hep-ex

Abstract: The higgsino world is one of the popular natural SUSY scenarios, in which $|\mu| \ll M_{gauginos} \ll M_{scalars}$. As such, searching for light degenerate higgsinos becomes an essential task of testing naturalness in supersymmetry (SUSY). In this work, we study the indirect effects of light higgsinos in the process $e^{+e^-} \to W^{+W^-$} at future Higgs factories, such as Circular Electron Positron Collider (CEPC) in China. we find that the higgsino mass parameter $\mu \lesssim 210$ GeV favored by naturalness can be covered if the accuracy of the measurement of $W^{+W^-$} production can reach 0.1\% at 240 GeV CEPC.