2019/10/03 by Zafer Altin, Zafer Altın, Ali Cici +11 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.1910.01457
arxiv created 2019/10/03 · openalex publication_date 2019/10/03 · arxiv updated 2019/10/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss the gluino mass in the CMSSM and Nonuniversal Gaugino Mass Models (NUGM) frameworks in light of the results from the current LHC and Dark Matter experiments. We probe the gluino mass scales by considering its decay modes into stop and top quarks, g→ t1t and g→ ttχ10, where t1t represents both t1t and t1*t. The region with m_g \lesssim 2 TeV is excluded up to 68% CL in the CMSSM if the gluino decays into a stop and top quark, while the 95% CL exclusion requires m_g\gtrsim 1.9 TeV. Such exclusion bounds on the gluino mass more or less overlap with the current LHC results. The decay mode g→ ttχ10 may take over if g→ t1t is not allowed. One can probe the gluino mass in this case up to about 1.5 TeV with 68% CL in the CMSSM, and about 1.4 TeV with 95% CL. A similar analyses in the NUGM framework yield exclusion curves for the gluino mass m_g\gtrsim 2.1 TeV at 14 TeV for both decay modes of the gluino under consideration. We also show that increasing the center of mass energy to 27 TeV can probe the gluino mass up to about 3 TeV through its decay mode into stop and top quark. The Dark Matter constraints are not very severe in the framework of NUGM, and they allow solutions with m_g,m_t \gtrsim 1 TeV. In addition, with NUGM the LSP neutralino can coannihilate with gluino and/or stop for m_g,m_t≈ m_χ10 ∈ [0.9-1.5] TeV. The 100 TeV FCC collider can probe the gluino masses up to about 6 TeV with 36.1~fb-1 integrated luminosity. We also find that the decay g→ tt can indirectly probe the stop mass up to about 4 TeV.