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Strong decays of $T_{cc}^+$ at NLO in an effective field theory

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arxiv 2301.11950 v2 pith:SG6MR62K submitted 2023-01-27 hep-ph

Lin Dai , Sean Fleming , Reed Hodges , Thomas Mehen This is my paper · ORCID
classification hep-ph
keywords contributionseffectivemesonfieldfinal-statelhcbmesonsresults
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The $T_{cc}^+$ exotic meson, discovered by the LHCb Collaboration in 2021, can be interpreted as a molecular state of $D^{(*)0}$ and $D^{(*)+}$ mesons. We compute next-to-leading-order (NLO) contributions to the strong decay of $T_{cc}^+$ in an effective field theory for $D$ mesons and pions, considering contributions from one-pion exchange and final-state rescattering. Corrections to the total width, as well as the differential distribution in the invariant mass of the final-state $D$ meson pair are computed. The results remain in good agreement with LHCb experimental results when the NLO contributions are added. The leading uncertainties in the calculation come from terms which depend on the scattering length and effective range in $D$ meson scattering.

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Cited by 3 Pith papers

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  1. Low-energy $DD$ scattering in lattice QCD

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    The first lattice QCD calculation of single-channel DD scattering finds a weakly repulsive S-wave isovector interaction and a slightly attractive P-wave isoscalar interaction.

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    New TQHL1.1 and TQ4Q1.1 fragmentation functions for doubly and fully bottomed tetraquarks are constructed and evolved, yielding first predictions for bottom-tetraquark plus jet distributions at 14 and 100 TeV.

  3. All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective

    hep-ph 2026-04 unverdicted novelty 5.5 of 10

    TQ4Q2.0 supplies the first complete, uncertainty-quantified set of NRQCD-based fragmentation functions for all-heavy tetraquarks, including nonconstituent channels and public grids for jet-associated production.

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