Designing the Muon System of a Muon Collider Experiment: Requirements from Muon Reconstruction and Technological Solutions

Abstract

A promising proposal for the future of particle acceleration is represented by the muon collider. Indeed, it would give the possibility to probe much higher energy scales than hadrons colliding at the same energy, with a greatly reduced pile up effect. The project poses a series of technological challenges, ranging from the muon acceleration process to the design of dedicated experiments. Concerning this last point, a full simulation is vital to understand the feasibility of the experiment implementation and for its development. A complete simulation, based on CLIC’s ILCSoft software, is then ongoing to understand the performances of the full detector, for muon beams collisions at a center-of-mass energy of 1.5 TeV. Focusing on the muon system in particular, the CLIC geometry foresees the instrumentation of the iron yoke plates with layers of track sensitive chambers in order to enhance the muon identification. The selected technology currently is glass Resistive Plate Chambers both for barrel and endcap region, with readout cells of 30x30 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . However, MicroPattern Gaseous Detectors are also under investigation, with the goal of improving rate capability, space and time resolution.This contribution will present the results of the first preliminary study investigating the muon reconstruction efficiency, the sensitivity to Beam-induced Background, and background mitigation. In addition, the different technological solutions for the instrumentation of the muon system will be discussed.