Mono-top signature from stop decay at the HE-LHC

Searching for the top squark(stop)is a key task to test the naturalness of SUSY.Different from stop pair production,single stop production relies on its electroweak properties and can provide some unique signatures.Following the single production process pp →(t)1(x)1-→ t(x)10(x)1-,the top quark has two decay channels:leptonic channel and hadronic channel.In this paper,we probe the observability of these two channels in a simplified minimal supersymmetric standard model scenario.We find that,at the 27 TeV LHC with the integrated luminosity of L= 15 ab-1,m(t)1 ＜ 1900 GeV and μ ＜ 750 GeV can be excluded at 2σ through the leptonic mono-top channel,while m(t)1 ＜ 1200 GeV and μ ＜ 350 GeV can be excluded at 2σ through the hadronic channel.