Precision Muonium Spectroscopy

Abstract

The muonium atom is the purely leptonic bound state of a positive muon and an electron. It has a lifetime of 2.2 $\mu$s. The absence of any known internal structure provides for precision experiments to test fundamental physics theories and to determine accurate values of fundamental constants. In particular groun dstate hyperfine structure transitions can be measured by microwave spectroscopy to deliver the muon magnetic moment. The frequency of the 1s-2s transition in the hydrogen-like atom can be determined with laser spectroscopy to obtain the muon mass. With such measurements fundamental physical interactions, in particular Quantum Electrodynamics, can also be tested at highest precision. The results are important input parameters for experiments on the muon magnetic anomaly. The simplicity of the atom enables further precise experiments, such as a search for muonium-antimuonium conversion for testing charged lepton number conservation and searches for possible antigravity of muons and dark matter.

accepted for JPSJ

References in corpus (15)

• Laboratory tests of Lorentz and CPT symmetry with muons
• Constraints on muon-specific dark forces
• Enhancement of muonium emission rate from silica aerogel with a laser ablated surface
• Ultrasensitive 3He magnetometer for measurements of high magnetic fields
• Quantum electrodynamic corrections to the hyperfine structure of excited S states
• Testing antimatter gravity with muonium
• Hadronic Light-by-Light Scattering in the Muonium Hyperfine Splitting
• Hard Nonlogarithmic Corrections of Order $m{\alpha }^7$ to Hyperfine Splitting in Positronium
• Three-Loop Radiative Corrections to Lamb Shift and Hyperfine Splitting
• Light-by-Light Scattering Nonlogarithmic Corrections to Hyperfine Splitting in Muonium
• Three-Loop Contributions to Hyperfine Splitting: Muon Loop Light-by-Light Insertion and Other Closed Lepton Loops
• Radiative-Recoil Corrections to Hyperfine Splitting: Polarization Insertions in the Muon Factor
• Matter-Antimatter Asymmetry - Aspects at Low Energy
• Spherical Fused Silica Cells Filled with Pure Helium for NMR-Magnetometry
• Muon Loop Light-by-Light Contribution to Hyperfine Splitting in Muonium

Cited by in corpus (6)

• The Mu-MASS (MuoniuM lAser SpectroScopy) experiment
• Precision measurement of the Lamb shift in Muonium
• Intense beam of metastable Muonium
• Towards an independent determination of muon g-2 from muonium spectroscopy
• Small magnetic charges and monopoles in non-associative quantum mechanics
• The ground state of non-associative hydrogen and upper bounds on the magnetic charge of elementary particles