Abstract

In order to explain limitations of the standard model theories often introduce exotic long-lived particles (LLPs), these have weak couplings to standard model particles such that they may escape detection at typical detectors close to the beamline. This has led to large programme of dedicated LLP experiments to develop over the last decade or so, which aim to capitalise on vast regions of uncovered parameter space. One such proposal is that of the COmpact Detector for EXotics at LHCb (CODEX-b), a moderately sized detector to be located close to the LHCb experiment. This talk will give an overview of the CODEX -b detector and its proposed aims, as well as discussing work undertaken on testing of essential detector components and track reconstruction studies to help inform and affirm the planned design of CODEX -b through the construction of a demonstrator, CODEX -β.