2017/08/29 by Howard Baer, V. Barger, Vernon Barger +3 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Electroweak interaction #Energy (signal processing) #Gluino #Minimal Supersymmetric Standard Model #Neutralino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Supersymmetry #Yukawa potential #hep-ph
paper · pdf · doi:10.1103/physrevd.96.115008
published as Phys. Rev. D 96, 115008 (2017) · 37 pages, 18 figures
arxiv created 2017/08/29 · openalex created_date 2017/09/15 · openalex publication_date 2017/12/14 · arxiv updated 2017/12/20 · openalex updated_date 2026/08/06
We examine the top squark (stop) and gluino reach of the proposed 33 TeV energy upgrade of the Large Hadron Collider (LHC33) in the Minimal Supersymmetric Standard Model (MSSM) with light Higgsinos and relatively heavy electroweak gauginos. In our analysis, we assume that stops decay to Higgsinos via \stackrel\texttildelowt1\ensuremath→t\stackrel\texttildelowZ1, \stackrel\texttildelowt1\ensuremath→t\stackrel\texttildelowZ2, and \stackrel\texttildelowt1\ensuremath→b\stackrel\texttildelowW1 with branching fractions in the ratio 1\ensuremath\mathbin:1\ensuremath\mathbin:2 (expected if the decay occurs dominantly via the superpotential Yukawa coupling), while gluinos decay via \stackrel\texttildelowg\ensuremath→t\stackrel\texttildelowt1 or via three-body decays to third-generation quarks plus Higgsinos. These decay patterns are motivated by models of natural supersymmetry where Higgsinos are expected to be close in mass to mZ, but gluinos may be as heavy as 5--6 TeV, and stops may have masses up to \ensuremath∼3 TeV. We devise cuts to optimize the signals from stop and gluino pair production at LHC33. We find that experiments at LHC33 should be able to discover stops with >5\ensuremathσ significance if m_\stackrel\texttildelowt1<2.3 (2.8) [3.2] TeV for an integrated luminosity of 0.3 (1) [3] ab^\ensuremath-1. The corresponding reach for gluinos extends to 5 (5.5) [6] TeV. These results imply that experiments at LHC33 should be able to discover at least one of the stop or gluino pair signals even with an integrated luminosity of 0.3 ab^\ensuremath-1 for natural supersymmetry models with no worse than 3% electroweak fine-tuning and quite likely both gluinos and stops for an integrated luminosity of 3 ab^\ensuremath-1.