Associated production of Ψ(2S) and Φ in diffractive proton-proton collisions at the LHCb experiment

Abstract

This dissertation presents the first study on the production of vector meson pairs ψ(2S)ϕ without additional activity in the detectors of the LHCb experiment. The data used were obtained from proton-proton collisions with a center-of-mass energy of 13 TeV, recorded during LHC Run 2 (2016–2018), with an integrated luminosity of 1.73 fb−1. The ψ(2S)ϕ candidates are reconstructed from the final decay states of the ψ(2S) and ϕ, corresponding to muon and kaon pairs, respectively, detected in the pseudorapidity region 2 < η < 5 and with pT > 200 MeV. The number of selected candidates is 40. The fiducial cross section for the production ψ(2S)(→ μ+μ−)ϕ(→ K+K−) is σψ(2S)ϕ = 0.0723 } 0.0117 pb (2) where the uncertainty is statistical. In addition, this dissertation presents a contribution to the update of the STARlight generator implementation within the LHCb experiment simulation framework.