BETHE-HEITLER MUON BACKGROUND AT A MUON COLLIDER

Multi-TeV muon colliders are an important option for a future energy frontier lepton collider since synchrotron radiation in a circular collider is significantly less than that expected in an electron collider. Muon decays are a major source of beam induced backgrounds that can affect the physics seen in a muon collider. For a muon collider with 750 GeV μ + μ  with 2×10 12 μ per bunch we would expect 8.6×10 5 muon decays per meter for the two beams. These backgrounds include electrons from muon decays, synchrotron radiation from the decay electrons, hadrons produced by photo-nuclear interactions, coherent and incoherent beam-beam pair production and Bethe-Heitler (B-H) muon production. This paper will describe a simulation of the B-H muon production in a muon collider. These muons can penetrate the collider ring magnets and shielding and can enter into the detector region. This simulation tracks B-H muons produced in the collider ring in the range of ±175 m from the interaction point.