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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 corrections -- including Lamb shifts, hyperfine splitting structure, and rare partial decay widths -- are incorporated up to next-to-next-to-leading-order (NNLO) accuracy. Beyond the dominant diphoton and difermion decays, the rates of higher-order decay channels -- including Dalitz, radiative, triple-photon, double-Dalitz, four-fermion, and neutrinos final states -- are determined.
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https://hal.archives-ouvertes.fr/hal-03656407
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Submitted on : Monday, May 2, 2022 - 10:30:54 AM
Last modification on : Wednesday, May 4, 2022 - 10:07:00 PM

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David d'Enterria, Redamy Perez-Ramos, Hua-Sheng Shao. Ditauonium spectroscopy. 2022. ⟨hal-03656407⟩

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