Luminosity measurements at CMS using DT Phase 2 Demonstrator

In Phase-2, CMS will rely on multiple detector systems and, in particular, DT Luminosity, this is the Synchronous histogramming of muon trigger primitives. In this phase hits from DT and RPC detectors will be combined to reconstruct muon track segments. The demonstrator system is equipped with 5 back-end boards. This report shows an analysis of several datasets recorded in 2023. Most of the analysis was performed for Fill 9062 (Stable Beams, 2452 colliding bunches). Background contributions such as type1 afterglow hits, cosmic and beam induced were analysed. Finally, the luminosity for one of the boards was computed.