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$T_{cc}^+$ decays: Differential spectra and two-body final states

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arxiv 2109.02188 v3 pith:UIO3QCA4 submitted 2021-09-05 hep-ph

Sean Fleming (Arizona U.) , Reed Hodges (Duke U.) , Thomas Mehen (Duke U.) This is my paper · ORCID
classification hep-ph
keywords charmspectrastatesboundcalculatedecaysdifferentialfinal
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The recently discovered tetraquark, $T_{cc}^+$, has quark content $cc\bar{u}\bar{d}$ and a mass that lies just below open charm thresholds. Hence it is reasonable to expect the state to have a significant molecular component. We calculate the decay of the $T_{cc}^+$ in a molecular interpretation using effective field theory. In addition we calculate differential spectra as a function of the invariant mass of the final state charm meson pair. These are in good agreement with spectra measured by LHCb. We also point out that if shallow bound states of two pseudoscalar charm mesons exist, then two-body decays to those bound states and a single pion or photon can significantly enhance the width of the $T_{cc}^+$.

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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

    hep-lat 2025-02 conditional novelty 6.0 of 10

    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.

  2. 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.

  3. Radiative decays of $X(3872)$ within $D{\bar D}^*$ molecular framework

    hep-ph 2026-07 conditional novelty 4.0 of 10

    Using nonrelativistic effective field theory, the X(3872) is treated as a D*D molecule to predict radiative decay widths to D D gamma, finding a strong neutral-over-charged hierarchy and quantifying D D rescattering effects.

  4. Production mechanism of doubly charmed exotic mesons $T_{cc}$

    hep-ph 2025-07 conditional novelty 4.0 of 10

    A coupled-channel model generates the Tcc(3875)+ as an isovector DD* molecule and predicts three additional J=1 tetraquark states, including a negative-parity resonance.

  5. Hydrogen-like structures in the strong interaction

    hep-ph 2025-05 reject novelty 4.0 of 10

    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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