The LHCb upgrade

Abstract

Profiting from a data sample of over 3 fb−1, collected during the LHC Run 1, exploiting protonproton collisions at the centre-of-mass energies of 7 TeV and 8 TeV, LHCb has successfully performed a large number of world-class precision measurements in heavy flavour physics. However, many of the LHCb measurements will remain limited by statistics, even though adding an integrated luminosity of 5 − 6 fb−1 at 14 TeV, expected in the LHC Run 2. The main obstacle preventing LHCb to run the detector at higher luminosities, with enhanced trigger efficiencies, is due to the current 1 MHz readout system limitation. LHCb will therefore undergo a major upgrade in the Long Shutdown 2 (2018 − 2019) aimed at collecting an order of magnitude more data by 2028. The upgrade consists of a new full readout operating at the LHC bunch crossing rate of 40 MHz, with a data acquisition system with the ultimate flexibility of a software trigger. The detector will be run at instantaneous luminosity of 2×1033 cm−2s−1, five times higher than presently. In order to cope with the higher occupancies and radiation doses several sub-detector upgrades are also underway.