Light higgsino-dominated NLSPs in semi-constrained NMSSM Supported by the National Natural Science Foundation of China (NNSFC) (11605123)
Kun Wang (
Center for Theoretical Physics, School of Physics and Technology, Wuhan University, Wuhan 430072, China); Jingya Zhu (
Center for Theoretical Physics, School of Physics and Technology, Wuhan University, Wuhan 430072, China)
In the semi-constrained next-to minimal supersymmetric standard model (scNMSSM, or NMSSM with non-universal Higgs mass) under current constraints, we consider a scenario where
is the SM-like Higgs,
is a singlino-dominated LSP;
and
are mass-degenerated, light, and higgsino-dominated next-to-lightest supersymmetric particles (NLSPs). We investigate the constraints of these NLSPs by searching for supersymmetry particles at the LHC Run-I and Run-II and discuss the possibility of discovering these NLSPs in the future. We arrive at the following conclusions: (i) With all data of Run I and up to
data of Run II at the LHC, the search results by ATLAS and CMS still cannot exclude the higgsino-dominated NLSPs of
. (ii) When the mass difference with
is smaller than
,
and
have opposite preferences with regard to decaying to
or
. (iii) When the mass difference between NLSP and LSP is larger than
, most samples can be verified at the
level with future
data at the LHC. Meanwhile, with
data at high-luminosity LHC (HL-LHC), almost all of the samples can be verified at the
level, even if the mass difference is insufficient. (iv) The
funnel and the
funnel mechanisms for the singlino-dominated LSP annihilation cannot be distinguished by searching for NLSPs.
