Luminosity at LHCb in Run 3

The physics performance of the LHCb detector in Runs 1 and 2 was optimised by stabilising the instantaneous luminosity during each fill. This was achieved by tuning the distance between the two colliding beams according to the measurement of instantaneous luminosity from hardware-based trigger counters. The upgraded LHCb detector operates at fivefold instantaneous luminosity compared to the previous runs. Consequently, a new approach to the luminosity measurement is adopted. New counters, with particular attention to maximum stability in time, and a new dedicated detector have been introduced for Run 3. Presented here is an overview of the newly implemented methods for luminosity measurement and the first results obtained using data collected during 2022.