The paper predicts a scalar cc-ccbar tetraquark state (X(6400)) and identifies it as the partner to the recently observed tensor state X(6600).
Hayrapetyanet al.(CMS), (2026), arXiv:2602.02252 [hep-ex]
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The authors construct and publicly release the TQ4Q2.0 fragmentation functions for all-heavy S-wave tetraquarks via NRQCD factorization, extending prior work with nonconstituent contributions and replica-based uncertainties.
QCD sum rule evaluation of a tensor all-charm tetraquark yields mass 6609±50 MeV and width 165±23 MeV, supporting its role as a key component of the observed X(6600) resonance.
citing papers explorer
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Predictions for the scalar partner of the LHC tetraquark $X(6600)$
The paper predicts a scalar cc-ccbar tetraquark state (X(6400)) and identifies it as the partner to the recently observed tensor state X(6600).
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All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective
The authors construct and publicly release the TQ4Q2.0 fragmentation functions for all-heavy S-wave tetraquarks via NRQCD factorization, extending prior work with nonconstituent contributions and replica-based uncertainties.
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Resonance $X(6600)$
QCD sum rule evaluation of a tensor all-charm tetraquark yields mass 6609±50 MeV and width 165±23 MeV, supporting its role as a key component of the observed X(6600) resonance.
- Two photon decay width of the fully charmed tetraquarks: revisiting prospects for ultraperipheral collisions