Hadronic molecule interpretation of $T^+_{cc}$ and its beauty-partners

TL;DR

This paper explores the interpretation of the recently discovered $T_{cc}^+$ tetraquark as a $DD^*$ hadronic molecule, calculating its properties and predicting potential beauty-partners for future experiments.

Contribution

It provides a hadronic molecule interpretation of $T_{cc}^+$ and predicts the existence of beauty-partners, supported by calculations within a one-meson exchange potential model.

Findings

Mass and decay width of $T_{cc}^+$ explained by the model

Binding energies around 1 MeV for $DD^*$ molecules

Potential for observing $T_{bb}$ partners in future experiments

Abstract

Motivated by the latest discovery of a new tetraquark $T_{cc}^+$ with two charm quarks and two light antiquarks by LHCb Collaboration, we investigated the $DD^*$ hadronic molecule interpretation of $T_{cc}^+$. By calculation, the mass and the decay width of this new structure $T_{cc}^+$ can be understood in one-meson exchange potential model. The binding energies for these $DD^*$ hadronic molecules with $J^P=1^+$ are around $1MeV$. Besides, we also studied the possible beauty-partners $T_{bb}(10598)$ of hadronic molecule $T^+_{cc}$, which may be feasible in future LHCb experiments.