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Quark mass dependence of the $T_{cc}(3875)^+$ pole
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abstract
Recently, several LQCD simulations have proven that the interaction in the isoscalar channel in $DD^*$ scattering is attractive. This channel is naturally connected to the $T_{cc}(3875)^+$ which is observed in the $D^0D^0\pi^+$ invariant mass distribution. However, it remains an open question whether the virtual bound state found in the several LQCD simulations is actually linked to the LHCb experimental observation. In this article we perform an EFT-based analysis of the LQCD data and demostrate that a proper chiral extrapolation leads to a $T_{cc}$ pole compatible with experiment. At the physical pion mass, we find a virtual bound state with a binding energy $\Delta E=-0.06 \left(^{+1.30}_{-2.20}\right) \left(^{+0.50}_{-1.11}\right)$. Moreover, we extract from a global analysis both, the light and heavy quark mass dependence of the $T_{cc}$ pole, and study the role of the $\rho$ and $\pi$ meson exchanges.
Forward citations
Cited by 3 Pith papers
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Pion scattering in finite volume within the Inverse Amplitude Method
A finite-volume ChPT+IAM framework with full t,u,tadpole loops yields a new determinant quantization condition and sizable energy-level corrections for mπL ≲ 2.
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Investigating the two-pion exchange of the double charm $DD^*$ chiral interactions and $T_{cc}$
In this chiral EFT calculation the I=0 DD* two-pion-exchange potential is repulsive, and its near-cancellation with attractive contact and one-pion terms provides the weak binding of Tcc.
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Hydrogen-like structures in the strong interaction
T_cc+ is assigned to a compact color-sextet tetraquark by a Born-Oppenheimer quark model, which also predicts stable doubly heavy tetraquarks.
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