Revisiting CMSSM with non-universal gaugino masses under current constraints

A bstract To address the longstanding tension between the Constrained Minimal Supersymmetric Standard Model (CMSSM) and recent experimental data, we investigate non-universal gaugino masses within an SU(5) Grand Unified Theory (GUT) framework, focusing on the $$ \overset{\sim }{g} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mi>g</mml:mi> <mml:mo>~</mml:mo> </mml:mover> </mml:math> -SUGRA scenario where | M 3 | ≫ | M 1 | , | M 2 |. This hierarchy enables a heavier gluino, thereby evading current experimental bounds on supersymmetric particles. Our analysis reveals that precise Higgs measurements place stringent constraints on the model, requiring tan β ≳ 5 and M 0 ≳ 20 tan β GeV . Although the $$ \overset{\sim }{g} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mi>g</mml:mi> <mml:mo>~</mml:mo> </mml:mover> </mml:math> -SUGRA scenario can help reconcile the persistent ( g − 2) μ anomaly, the Higgs constraints significantly restrict its parameter space, making a large contribution to ( g − 2) μ challenging. We also assess the discovery prospects in upcoming dark matter direct detection experiments, including PandaX-xT (200 t.y.), LZ (projected), and XENONnT (20 t.y.), which may not fully cover the viable parameter space. In contrast, future collider experiments — such as the High-Luminosity LHC at 3 ab − 1 and CLIC 1500 at 2 . 5 ab − 1 — can comprehensively probe the remaining regions. These findings highlight $$ \overset{\sim }{g} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mi>g</mml:mi> <mml:mo>~</mml:mo> </mml:mover> </mml:math> -SUGRA as a promising solution to the CMSSM tension and offer clear, testable predictions for upcoming collider searches.