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Molecular picture for $X_{0}(2900)$ and $X_1(2900)$

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arxiv 2008.07782 v4 pith:RBTGRKN5 submitted 2020-08-18 hep-ph

classification hep-ph
keywords stateboundinteractionvirtualinteractionslhcbobservedsearched
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Inspired by the newly observed $X_{0}(2900)$ and $X_1(2900)$ at LHCb, the $K^*\bar{D}^*$ and $K\bar{D}_1$ interactions are studied in the quasipotential Bethe-Salpeter equation approach combined with the one-boson-exchange model. The bound and virtual states from the interactions are searched for as the poles in the complex energy plane of scattering amplitude. A bound state with $I(J^P)=0(0^+)$ and a virtual state with $0(1^-)$ are produced from the $K^*\bar{D}^*$ interaction and $K\bar{D}_1$ interaction, and can be related to the $X_{0}(2900)$ and $X_1(2900)$ observed at LHCb, respectively. A bound state with $I(J^P)=0(1^+)$ and a virtual state with $I(J^P)=0(2^+)$ are also predicted from the $K^*\bar{D}^*$ interaction with a small $\alpha$ value, which can be searched in future experiments.

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Forward citations

Cited by 4 Pith papers

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

  1. Singly heavy tetraquarks

    hep-ph 2026-07 conditional novelty 6.0 of 10

    A hybrid quark model with gluon and meson exchange predicts that LHCb's T-c̄s̄0(2870) and T-cs̄0(2900) are compact tetraquarks, and that Ds0(2317), Ds1(2460), Tbs(5568), and Tcs(2327) are not.

  2. Prediction of $QQqq\bar{s}$ molecular pentaquarks within the extended local hidden gauge approach

    hep-ph 2025-08 reject novelty 6.0 of 10

    A model calculation predicts fourteen double-heavy molecular pentaquark states, but their existence and binding energies depend critically on an unconstrained regularization parameter.

  3. $T^a_{c\bar{s}0}(2900)$, $T_{cs0}^*(2870)^0$, and other singly-heavy tetraquark states

    hep-ph 2026-05 unverdicted novelty 4.0 of 10

    A mass splitting model anchored to X(4140) interprets LHCb's T^a_c sbar0(2900) and T_cs0*(2870)^0 as particular singly-heavy tetraquarks and forecasts several narrow states.

  4. Explicitly exotic heavy flavor mesons

    hep-ph 2026-07 unverdicted novelty 3.0 of 10

    A coupled-channel three-body calculation predicts an isovector exotic meson with explicit charm and strangeness content.

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