Ditauonium spectroscopy

Abstract

We examine the properties of ditauonium, an exotic atom consisting of a pair of opposite-sign $\tau$ leptons bound together by the quantum electrodynamics (QED) interaction in a hydrogen-like state. The energy levels, decay modes and associated partial widths, as well as total widths and lifetimes of the ortho- and para-ditauonium states are calculated. Higher-order QED effects -- including Lamb shifts, hyperfine splitting structure, and partial decay widths corrections -- are incorporated up to approximately next-to-next-to-leading-order (NNLO) accuracy. Beyond the dominant diphoton and difermion decays, the rates of rare decay channels -- including Dalitz, radiative, triple-photon, double-Dalitz, four-fermion, and neutrinos final states -- are determined.

18 pages, 8 figures. Typos corrected

References in corpus (3)

• Production of the Smallest QED Atom: True Muonium (mu^+ mu^-)
• Electroweak Corrections to the True Muonium Hyperfine Splitting
• Hyperfine Splitting in True Muonium to $\mathcal{O}(m_{\mu }{\alpha }^6)$: Two Photon Annihilation Contribution from Other Flavors

Cited by in corpus (10)

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• Novel method for identifying the heaviest QED atom
• Rare few-body decays of the Standard Model Higgs boson
• NLO Corrections to Dimuonium Production in Photon-Photon Collision
• Transition of dimuonium through foil
• Production of leptonium in heavy quarkonium decays
• Automated event generation for S-wave quarkonium and leptonium production in NRQCD and NRQED