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Abstract:
Supersymmetry (SUSY) is explored to uncover new physics beyond the Standard Model that can explain unresolved issues, such as the existence of dark matter. Numerous searches for SUSY were conducted by the ATLAS and CMS experiments during the LHC Run 2 period. Although no conclusive evidence for SUSY has been found, but these analyses have set stringent limits on the parameter space of supersymmetric models, particularly through interpretations based on Simplified Models. In this study, we reinterpret the full suite of ATLAS Run 2 SUSY search results within the 19-parameter phenomenological Minimal Supersymmetric Standard Model (pMSSM), enabling a broader and more realistic exploration of SUSY. The particle-level results will be presented, while the detector-level results are still in progress to make an accurate conclusion. This work represents a step forward in guiding experimental efforts toward uncovering possible supersymmetric signals.
CV:
Hammad began in particle physics with the CMS experiment at NCP, working on a multi-lepton tZq analysis and using BDTs to improve signal–background separation. I then moved to ATLAS at IFIN-HH, completing his Qualification Task in the Combined Performance EGamma group by contributing to the Tag-and-Probe framework and measuring electron reconstruction efficiencies for full Run2 and early Run3 data. Since 2023, I have been in the CP Tracking group, focusing on fake- and lost-track measurements in dense environments. During my PhD, I led reinterpretation studies assessing Run 2 SUSY sensitivity via pMSSM and extending gluino limits through mono-jet reinterpretations, both as the main analyst. Hammad is currently a Postdoctoral Research Assistant at IFIN-HH, contributing to ATLAS Physics Validation (PHYSVAL) group through the Software Development Grant 2025 and developing a BDT-based MVA for the Run3 H→Za→ℓℓγγ (ALP a) analysis.