Observation of the \({\mathbf{\Lambda }}_{{{b}}}^{0}\) → J/ψΞ⁻K⁺ Decay at CMS

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发表日期：

2025年10月1日

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M. A. Sergeev,
S. M. Polikarpov

摘要

Abstract

The paper describes the observation of a new decay of a beauty baryon using the data collected in CMS experiments in 2016, 2017, and 2018 in proton‒proton collisions at a center-of-mass energy of 13 TeV. The study of the new decay deserves attention because its products contain a charmonium resonance and a doubly strange cascade hyperon, which opens a pathway to the search for new types of pentaquark states. The branching fraction ratio of the new decay to the normalization channel decay is measured.

Observation of the \({\mathbf{\Lambda }}_{{{b}}}^{0}\) → J/ψΞ−K+ Decay at CMS

摘要

Observation of the \({\mathbf{\Lambda }}_{{{b}}}^{0}\) → J/ψΞ⁻K⁺ Decay at CMS