Precise Probing of the Dark Sector at the LHC and its Synergy with Evolution Mechanism in the Early Universe
摘要
Despite compelling evidence from numerous astrophysical and cosmological observations, dark matter (DM) remains an enigma, lacking much insight into its fundamental properties and evolution in the early universe. In this work, we discuss how different DM scenarios, constructed with a minimalistic setup, can be probed at the collider, especially in the context of the Large Hadron Collider (LHC) with precision search. It is fascinating to note the synergy between different DM candidates, such as WIMP and FIMP. Understanding their evolution mechanisms alongside the appropriate search strategies can significantly enhance the exploration of their unique signatures at colliders. Our investigations incorporate one-loop QCD corrections for the production processes and also leverage an advanced multivariate analysis, employing a boosted decision tree to optimise our search strategy, enhancing signal and background discrimination.