Search for non-resonant B0 s ! J/y K0 s K0 s decay at CERN-LHC-CMS(p s =13.6 TeV)

Abstract

The Compact Muon Solenoid (CMS) at the Large Hadron Collider (LHC), CERN (Conseil europeen pour la Recherche Nucleaire) is a general purpose detector for probing Standard Model physics. The ongoing, third operational phase (Run 3) of the LHC witnesses the CMS experiment operating at a remarkable collision energy of 13.6 trillion electronvolts (13.6TeV) and a luminosity of 22.17 femtobarn 1 (22.17fb 1). The B0 s !J/yK0 sK0 s decay channel, where J/y decays to µ+µ and K0s decays to p+p final state, is a rare decay with a low branching ratio and offers a unique window into flavor physics. Flavor physics involving B meson decays has played a crucial role in the baryon asymmetry and CP violation studies. This decay process is significantly enhanced with intermediate particles (f0 2 and f), which can further decay to K0sK0s. The Cut and Count method and Boosted Decision Trees (BDT) method are implemented to search for non resonant (decay without an intermediate) decay of B0 s to J/yK0sK0s as it has never been observed before. The analysis is done using simulated Monte Carlo (PYTHIA8, GEANT4) and experimental proton-proton collision data (CMS-Run3).