Search for non-resonant B 0s ! J/y K 0s K 0s decay p at CERN-LHC-CMS ( s = 13.6 TeV)

Abstract

The Compact Muon Solenoid (CMS) at the Large Hadron Collider (LHC), CERN (Conseil européen pour la Recherche Nucléaire) is a general purpose detector for prob- ing 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 tril- lion electronvolts (13.6TeV ) and a luminosity of 22.17 f emtobarn 1 (22.17 fb 1 ). The B 0s ! J/yK 0s K 0s decay channel, where J/y decays to µ + µ and K s 0 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 ( f 2 0 and f ), which can further decay to K s 0 K s 0 . The Cut and Count method and Boosted Decision Trees (BDT) method are implemented to search for non- resonant (decay without an intermediate) decay of B 0 s to J/yK s 0 K s 0 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).