Speaker: Henry Lubatti (U. Washington)
Title: Long-lived particles – Messengers from a Hidden Sector
Host: Chertok
Room: 285
Abstract: The completion of the Standard Model (SM) has left us with key central issues suggesting that “physics beyond the Standard Model (BSM) is likely and, in some cases, unavoidable” as noted in the Snowmass report of the Physics Beyond the Standard Model at Energy Frontier. Dark Matter, matter - antimatter asymmetry of the universe, very light neutrino masses etc. have led to many theoretical constructs that attempt to address these issues. All allow for long-lived and feebly interacting particles, which may be connected to DM and reside in a hidden sector that has no charge in common with the SM sector. The hidden sector may have a rich phenomenology like the SM sector. Such possibilities have triggered a large effort in ATLAS, CMS and LHCb to search for evidence of long-lived particles that have decays displaced from the IP. Unfortunately, the LLP models do not predict the lifetime; thus, we need to search over a large range of lifetimes with perhaps the only limit being Big Bang Nucleosynthesis that occurs about 0.1 s after the Big Bang. To cover such a wide variety of signals and lifetimes in a SM background free environment, several auxiliary experiments have been proposed. In this talk I will review some of the LHC detector searches and proposed auxiliary experiments.
