PLANS AND PHYSICS OUTLOOK FOR NON-HIGH LUMINOSITY EXPERIMENTS UNTIL AND AFTER LS3

Abstract

Based on the current physics scene, the future holds more than ever a joint enterprise of precision measurements and direct searches. With its very broad scientific program of heavy flavour precision measurements both in the beauty and the charm sector, as well as forward electroweak precision physics, LHCb has demonstrated to be a powerful forward general purpose detector complementary to ATLAS and CMS. After the expected lifetime of 10 fb -1 for the current experiment, the precision of many measurements will still be limited by statistics. Experience from Run 1 shows that systematic uncertainties are not expected to limit the precision down to the theoretical uncertainties. LHCb will thus undergo one major upgrade in LS2 to the ultimate flexibility of a full software trigger, together with a sub-detector configuration which should allow improving the physics yield up to an instantaneous luminosity of 2x10 33 cm -2 s -1 , with the goal of collecting an integrated luminosity of at least 50 fb -1 by 2028. The flexibility of the upgrade also prepares LHCb for any changes in the physics scene beyond LS2. The ion program is an integral part of the LHC physics program. For the purpose of physics normalization, detector re-commissioning and calibrations, the ALICE experiment requires data taking during the nominal proton-proton physics and at nucleon-nucleon energies equivalent to the heavy ion collisions. This will evolve with the major upgrade of ALICE which is currently planned for LS2. In view of the LHC and the injector upgrades, this paper reviews the physics motivations, the upgrade and consolidation programs, and the operational requirements and schedule for LHCb and for the ALICE proton-proton data taking into the HL-LHC era. For completeness, it also covers the relevant aspects of the LHC forward physics program and other special runs.