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Studying the $\bar{D}_1K$ molecule in the Bethe-Salpeter equation approach

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arxiv 2101.06688 v3 pith:T2CV4OUI submitted 2021-01-17 hep-ph

classification hep-ph
keywords bethe-salpeterequationapproachdecayfactorsformkernelstate
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We interpret the $X_1(2900)$ as an $S$-wave $\bar{D}_1K$ molecular state in the Bethe-Salpeter equation approach with the ladder and instantaneous approximations for the kernel. By solving the Bethe-Salpeter equation numerically with the kernel containing one-particle-exchange diagrams and introducing three different form factors (monopole, dipole, and exponential form factors) in the verties, we find the bound state exists. We also study the decay width of the decay $X_1(2900)$ to $D^-K^+$.

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Cited by 2 Pith papers

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

  1. 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.

  2. 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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