### Abstract

We consider the hyperfine structure, the atomic spectrum, and the decay channels of the bound [Formula Presented] system (dimuonium). The annihilation lifetimes of low-lying atomic states of the system lie in the [Formula Presented] s range. The decay rates could be measured by detection of the decay products (high-energy photons or electron-positron pairs). The hyperfine-structure splitting of the dimuonic system and its decay rate are influenced by electronic vacuum polarization effects in the far timelike asymptotic region. This constitutes a previously unexplored kinematic regime. We evaluate next-to-leading-order radiative corrections to the decay rate of low-lying atomic states. We also obtain order [Formula Presented] corrections to the hyperfine splitting of the [Formula Presented] and [Formula Presented] levels.

Original language | English |
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Pages (from-to) | 4483-4495 |

Number of pages | 13 |

Journal | Physical Review A - Atomic, Molecular, and Optical Physics |

Volume | 56 |

Issue number | 6 |

DOIs | |

Publication status | Published - Jan 1 1997 |

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics

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## Cite this

*Physical Review A - Atomic, Molecular, and Optical Physics*,

*56*(6), 4483-4495. https://doi.org/10.1103/PhysRevA.56.4483