The first order QED corrections to the polarized muon decay spectrum are considered. The exact dependence on electron and muon masses is kept. Numerical results are presented.

The muon (g − 2) experiment is described, and the recent results are presented. These results represent the final measurement for the positive muon.

We present the results of muon-spin relaxation measurements on ferromagnetic BiMnO3. Below TC = 98.0(1) K oscillations in the time-dependence of the muon polarization are observed, characteristic of a quasistatic magnetic field at a single muon site, allowing us to probe the critical behaviour associated with the magnetic phase transition. We are able to suggest candidate muon sites on the basi...

B. Lee Roberts , Department of Physics, Boston University, Boston, MA 02215, USA for the Muon Collaboration[1] Abstract The Muon experiment, E821, at the Brookhaven AGS has the goal to measure the muon anomalous magnetic moment to a relative accuracy of . A superferric 14 m diameter storage ring has been constructed and an averaged magnetic field uniformity over the 90 mm diameter muon storage ...

A simple network of comparators applied to the strip signals of a cathode strip chamber allows quick hit localization to within a halfstrip width, or +/a quarter-strip. A six-plane chamber with 6.4 mm wide strips was tested in a high-energy muon beam. The chamber was placed behind a 30 cm thick iron block. We show that patterns of hits localized to within a halfstrip allowed us to identify 300 ...

The possibility of achieving the high muon fluxes suggested in recent work on muon colliders has revived interest in the idea of using muon storage rings for neutrino production. Through proper design of the lattice, a significant fraction of the stored muons can be converted into an intense, low-divergence beam of neutrinos. This work examines the incorporation of a long, high-beta straight se...

Large emittance muon beam must be reduced or cooled both longitudinally and transversely before it can be accelerated in an accelerator complex for a neutrino factory or a muon collider. In practice, ionization cooling is considered to be one of the most promising transverse cooling schemes for muon beams. When traversing an ionization cooling channel, which consists of absorbers and low freque...

The neutral Higgs boson is expected to have a mass in the region 90-150 GeV/c2 in various schemes within the Minimal Supersymmetric extension to the Standard Model. A first generation Muon Collider is uniquely suited to investigate the mass, width and decay modes of the Higgs boson, since the coupling of the Higgs to muons is expected to be strong enough for it to be produced in the s channel m...

We consider three-loop radiative-recoil corrections to hyperfine splitting in muonium generated by the diagrams with electron and muon vacuum polarizations. We calculate single-logarithmic and nonlogarithmic contributions of order alpha;{3}(m/M)E_{F} generated by gauge invariant sets of diagrams with electron and muon polarization insertions in the electron and muon factors. Combining these cor...

Muons with a high transverse momentum (pT ) are produced in cosmic ray air showers via semileptonic decay of heavy quarks and the decay of high pT kaons and pions. These high pT muons have a large lateral separation from the shower core muon bundle. IceCube is well suited for the detection of high pT muons. The surface shower array can determine the energy, core location and direction of the co...