What question did this study set out to answer?

This research aims to analyze the decay processes of heavy mesons to newly observed open-charmed tetraquark states.

February 8, 2026Open Access

Heavy Mesons to Charmed Tetraquark Decays

Key Points

This research aims to analyze the decay processes of heavy mesons to newly observed open-charmed tetraquark states.
Utilized a topological amplitude approach to study decay processes.
Decomposed strong decay amplitudes of tetraquark states into several topological components.
Analyzed weak decay amplitudes of B-mesons into tetraquark states and other mesons.
Discussed decay processes involving B_c mesons and their impact on exotic flavor interpretations.
Identified specific decay modes of heavy mesons leading to tetraquark states.
Highlighted the distinct exotic interpretations from the decay patterns observed.
Provided a comprehensive analysis of strong and weak decay amplitudes relevant to recent LHCb observations.

Abstract

Motivated by the recent observations of T^*₂ₒ₀ (2870) ⁰, T^*₂ ₒ ₀ (2900) ⁰ and T^*₂ ₒ ₀ (2900) ^++ open-charmed tetraquark states by LHCb, we study the decays of heavy mesons to these open-charmed tetraquark states (T) using a topological amplitude approach. We first obtain the T DP and DS strong decay amplitudes by decomposing them into several topological amplitudes, where D is a charmed meson, P is a light pseudo-scalar particle and S is a low-lying scalar particle. Subsequently, weak decay amplitudes of B-meson decays, B D T, D T and B TP, TS decays are decomposed topologically. In addition, B^-c T T decays are also discussed. Using these results, modes with an unambiguous exotic interpretation in flavor are highlighted.

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