The next generation of neutrino oscillation experiments, JUNO, DUNE, and HK, are under construction now and will collect data over the next decade and beyond. As there are no approved plans to follow up this program with more advanced neutrino oscillation experiments, we consider here one option that had gained considerable interest more than a decade ago: a neutrino factory. Such an...
Muons produced through pion decay have high emittances, occupying a large volume in phase space. Hence, cooling is required to reduce the muon phase space density before acceleration. Traditional cooling schemes are too slow to be practical for muon beams. A novel technique proposed for muon colliders, ionization cooling, is instead considered. Muons are passed through absorbers, where they...
A future 10TeV muon collider presents exciting opportunities for the direct detection of charged long-lived particles. We present here a study of long-lived staus, using gauge-mediated supersymmetry breaking as a benchmark model. The stau decays into a tau and a gravitino, with the gravitino as a dark matter candidate. Analysis of stau reconstruction efficiency provides insight into the...
The collider and detector proposed by the International Muon Collider Collaboration (IMCC) will reach a 10 TeV physics frontier as a means to fully understand the Higgs and explore new physics beyond LHC production capabilities. A muon collider has significant advantages, but comes with many challenges. One of such is the detector simulation, and in particular the beam-induced background (BIB)...
A future 10 TeV muon collider holds significant promise, enabling precise, percent-level measurements of Standard Model Properties. However, we must first produce, accelerate, and collide muons before they decay. The process begins by accelerating a proton beam and colliding it with a target, producing a “basketball-sized” cloud of muons. In the next step, known as cooling, this muon cloud is...
Homogeneous inorganic scintillator-based calorimeters are the gold standard for electromagnetic energy resolution, but often degrade the hadronic energy resolution achievable at colliders. By incorporating the dual readout technique, we seek to improve the hadronic energy resolution of these calorimeters through the measurement and separation of the scintillation and Cherenkov light in...
This study investigates the optimization of pion and muon yields from an 8GeV proton beam incident on a graphite target, as part of a design effort for a muon collider demonstrator. The primary objective is to determine the optimal geometric configuration between the target and a solenoidal capture channel to maximize secondary particle production while mitigating potential damage from...
Axion-like particles (ALPs) are well-motivated extensions of the Standard Model (SM) that appear in many new physics scenarios, with masses spanning a broad range. In this work, we systematically study the production and detection prospects of light ALPs at future lepton colliders, including electron-positron and multi-TeV muon colliders. At lepton colliders, light ALPs can be produced in...
Abstract. Skrinsky and Parkhomchuk introduced the concept of ionization cooling in 1981[1] and the muon collider concept was proposed by Neuffer in 1983[2]. Considerable progress has been made on muon collider design, with one baseline design being established by Palmer, et al.[3] in 1995. Present conceptual designs for a muon collider start with a proton beam driver. The protons are directed...
A major challenge to achieve the requisite beam luminosity for a muon collider is to cool the muon beams generated from targets by up to five orders of magnitude in 6D emittance. Ionization cooling is a promising method that has been proposed in the past. However, given the unavoidable performance tradeoffs in any cooling system, creating a design that effectively meets requirements poses an...
MAIA (Muon Accelerator Instrumented Apparatus) is a detector concept for a 10 TeV muon collider, designed for precision studies of the standard model as well as searches for new physics. Efficient electron reconstruction and identification is essential, as electrons are commonly produced in key processes such as Higgs boson decays. It is difficult to efficiently reconstruct electrons in this...
Accurate and efficient simulations are necessary for the research and development of particle colliders. A current muon collider design, MAIA, has tungsten nozzles that create a significant amount of initial showering when a particle interacts with them. This is by design in practice, however, it results in a largely unnecessary CPU time during simulation. DDSim tracks each particle...
The study of electroweak gauge boson self-couplings at a muon collider provides a opportunity to probe new physics and deepen our understanding of electroweak symmetry breaking. At multi-TeV, the muon collider effectively acts as a vector boson collider, as vector boson scattering (VBS) becomes the dominant production mechanism due to logarithmic enhancements from gauge boson radiation....
We present a preliminary lattice based on a bottom up design for a rapidly cycling synchrotron (RCS) accelerator chain for a multi-TeV muon collider based at Fermilab. The RCS rings range in circumference from 6.28 km (that of the Tevatron) to 15.5 km (the current estimate for the maximum that can be accommodated at the Fermilab site). Each ring is either a conventional RCS (consisting of...
As one of the main proposed future colliders that will allow us to reach energy scales that can probe Beyond the Standard Model phenomena, muon colliders come with unique challenges. To achieve the desired luminosity, namely 1, 10, and 20 ab-1 for 3, 10, and 14 TeV, respectively, the six-dimensional emittance of the muon beam needs to be reduced significantly in a process described as muon...
With the introduction of beam-induced background from the decay of muons in the beam pipe of future muon colliders, new techniques must be implemented to filter out the large volume of data generated by such events. The potential presence of long-lived novel particles, which evade conventional time-based cuts, motivates the development of geometrical differentiation methods at the on-chip...
At a 10TeV muon collider, a high level of beam induced background (BIB) will overlay signal produced from muon collisions, similar to how pile-up at the HL-LHC will overlay signal from proton-proton collisions. On-detector differentiation of BIB from signal would improve performance of the inner pixel tracker. For the HL-LHC, we are developing a “smartpixel” application specific integrated...
