Future Prospects for Searches

Abstract

The high luminosity phase of the LHC (HL-LHC) is planned to follow a LHC Run III where \({300}{{\,\text {fb}^{-1}}}\) of Open image in new window collisions are expected to be collected, and to start after the completion of the LHC upgrades during the long shutdown in 2024–2025. The goal is to increase the integrated luminosity further by a factor of 10, collecting a dataset of about \({3000}{{\,\text {fb}^{-1}}}\) in a decade of Open image in new window collisions at \(\sqrt{s} = {14}\,\mathrm{TeV}\). It is an unprecedented opportunity to study very rare phenomena, where Open image in new window production represents a top priority subject of research. An early understanding of the sensitivity to observe Open image in new window production and measure the Higgs boson trilinear coupling is thus important to organize future searches. This chapter presents the prospects for HH measurements at the HL-LHC from an extrapolation of the current results. Results are derived under various scenarios of detector performance and analysis improvements.