【摘 要】
：
Combining the b → sμ+μ-anomaly and dark matter observables,we study the capability of the LHC to test dark matter,Z\',and a vector-like quark.We focus on a local U(1)Lμ-Lr model with a vector-like SU(2)L doublet quark Q and a complex singlet scalar whos
【机 构】
：
Center for Advanced Quantum Studies,Department of Physics,Beijing Normal University,Beijing 100875,C
论文部分内容阅读
Combining the b → sμ+μ-anomaly and dark matter observables,we study the capability of the LHC to test dark matter,Z\',and a vector-like quark.We focus on a local U(1)Lμ-Lr model with a vector-like SU(2)L doublet quark Q and a complex singlet scalar whose lightest component XI is a candidate of dark matter.After im-posing relevant constraints,we find that the b → sμ+μ-anomaly and the relic abundance of dark matter favor mX1＜350 GeV and mz′＜450 GeV for mQ＜2 TeV and mXR＜2 TeV(the heavy partner of mXI).Current searches for jets and missing transverse momentum at the LHC sizably reduce the mass ranges of the vector-like quark,and mQ is required to be larger than 1.7 TeV.Finally,we discuss the possibility of probing these new particles at the high luminosity LHC via the QCD process pp→ D(D)followed byD → s(b)X1,D → s(b)Z′X1,and then Z′→μ+μ-.Taking a benchmark point of mQ=1.93 TeV,mz′=170 GeV,and mx1,=145 GeV,we perform a detailed Monte Carlo simulation and find that this benchmark point can be accessed at the 14 TeV LHC with an integrated lu-minosity of 3000 fb-1.
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