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Coupled-channel analysis reveals double-charm tetraquark as a hadronic molecule

Published on:

16 November 2023

Primary Category:

High Energy Physics - Phenomenology

Paper Authors:

Lin Qiu,

Chang Gong,

Qiang Zhao

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Key Details

Tcc+ is analyzed as a DD* hadronic molecule using meson exchange potentials in a coupled-channel model

Fitting the D0D0π+ mass spectrum precisely determines the Tcc+ pole position

Relations to DD, D*D* and charmonium-like states probe heavy quark spin symmetry

Comparisons highlight symmetry breaking effects and role of short/long distance dynamics

AI generated summary

Coupled-channel analysis reveals double-charm tetraquark as a hadronic molecule

This paper investigates the newly discovered double-charm tetraquark Tcc+ as a hadronic molecule using a coupled-channel meson-exchange model. By analyzing the D0D0π+ mass spectrum, the model extracts precise pole parameters for Tcc+, confirming its molecular nature. Extending the model to related charm systems provides insight into heavy quark spin symmetry partners like the still unobserved DD molecule, and charmonium-like states X(3872) and Zc(3900). Though relying on flavor symmetry, comparisons reveal symmetry breaking effects and the interplay of short and long-distance dynamics in these near-threshold charm bound states.

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