Speaker
Domenico Galli
(BO)
Description
During the LHC Run 1 the LHCb experiment has successfully performed a large number of world-class precision measurements in heavy flavour physics by having collected over 3 fb-1 at centre-of-mass energies of 7 TeV and 8TeV. However, even after an additional expected integrated luminosity of 5-6 fb-1 in Run 2, many of the LHCb measurements will remain limited by statistics. The current 1 MHz readout system is the main bottle neck to run LHCb at higher luminosity and with higher trigger efficiencies. LHCb will therefore undergo a major upgrade in the Long Shutdown 2 of LHC (2018- 2019) aimed at collecting an order of magnitude more data by 2028. The upgrade consists of a new full readout at the LHC bunch crossing rate (40 MHz) with the ultimate flexibility of only a software trigger. In order to increase the instantaneous luminosity five times, up to 2x10^33 cm-2s-1, several sub-detector upgrades are also underway, such to cope with the expected higher occupancies and radiation dose. The talk will focus on the PCIe based readout and the Event Builder we are developing in collaboration of INFN Bologna, INFN-CNAF and the LHCb Online CERN group.
