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1. chinaXiv:201612.00422 [pdf]

Current experimental bounds on stop mass in natural SUSY

Han,C; Hikasa,K; Wu,L; Yang,JM; Zhang,Y
Subjects:

Motivated by the recent progress of direct search for the productions of stop pair and sbottom pair at the LHC, we examine the constraints of the search results on the stop (t ? ) mass in natural SUSY. We first scan the parameter space of natural SUSY in the framework of MSSM, considering the constraints from the Higgs mass, B-physics and electroweak precision measurements. Then in the allowed parameter space we perform a Monte Carlo simulation for stop pair production followed by t ? → tχ ?0 or t ? → bχ ?+ and sbottom pair production followed by ?b → bχ ?0 or ?b → tχ ??. 1111 1111 Using the combined results of ATLAS with 20.1 fb?1 from the search of l + jets + E/ T , hadronic tt ?+E/T and 2b+E/T, we find that a stop lighter than 600 GeV can be excluded at 95% CL in this scenario.

submitted time 2016-12-28 Hits2128Downloads1216 Comment 0

2. chinaXiv:201612.00401 [pdf]

Single top squark production as a probe of natural supersymmetry at the LHC

Hikasa,K; Li,J; Wu,L; Yang,JM
Subjects:

Light top squarks (stops) and light higgsinos are the key features of natural supersymmetry (SUSY), where the higgsinos χ?1± and χ?1,20 are nearly degenerate and act as the missing transverse energy (ET) at the LHC. Besides the pair production via strong

submitted time 2016-12-28 Hits1781Downloads1040 Comment 0

3. chinaXiv:201612.00243 [pdf]

Leptonic mono-top from single stop production at LHC

Duan,GH; Hikasa,K; Wu,L; Yang,JM; Zhang,M
Subjects:

Top squark (stop) can be produced via QCD interaction but also the electroweak interaction at the LHC. In this paper, we investigate the observability of the associated production of stop and chargino, pp→t~1χ~?1pp→t~1χ~1?pp \to \tilde{t}_1\tilde{\chi}^-_

submitted time 2016-12-27 Hits1469Downloads867 Comment 0

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