pith. sign in

arxiv: 2606.01758 · v1 · pith:XRJCSMSGnew · submitted 2026-06-01 · ✦ hep-ph · hep-ex

Prediction of doubly-charm hadronic molecules with double strange quarks

Fu-Lai Wang , Xiang Liu This is my paper

Pith reviewed 2026-06-28 14:08 UTC · model grok-4.3

classification ✦ hep-ph hep-ex
keywords molecular tetraquarkscharmed-strange mesonsone-boson-exchange modelexotic hadronshidden-charm hidden-strangenessdoubly-charm moleculesT-doublet states
0
0 comments X

The pith

The one-boson-exchange model predicts that T-doublet charmed-strange meson pairs form hidden-charm hidden-strangeness molecular tetraquarks, including states with exotic quantum numbers.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper investigates whether pairs of T-doublet charmed-strange mesons and their antiparticles can bind into molecular tetraquarks carrying both hidden charm and hidden strangeness. By applying the one-boson-exchange model, it identifies several combinations that should produce bound states with definite J^PC quantum numbers. A key point is that one of these states carries exotic quantum numbers that conventional mesons cannot have, offering a clear experimental signature. The work also extends the analysis to same-charge pairs to predict absolutely flavor-exotic doubly-charm doubly-strange molecules. Confirmation of these predictions would expand the known spectrum of exotic hadrons.

Core claim

In the one-boson-exchange model the T-doublet mesons D_s1 and D_s2* bind with their antiparticles to form hidden-charm hidden-strangeness molecular tetraquarks. The candidate systems are D_s1 bar D_s1 (J^PC = 0++, 1+-, 2++), D_s1 bar D_s2* (1+-, 2+-, 3+-), and D_s2* bar D_s2* (0++, 1+-, 2++, 3+-, 4++). The D_s1 bar D_s2* state with J^PC = 2+- has exotic quantum numbers forbidden for q bar q mesons. The same framework applied to D_s1 D_s1, D_s1 D_s2*, and D_s2* D_s2* yields promising doubly-charm doubly-strange molecular candidates with J^P = 2+, 3+, and 4+ respectively.

What carries the argument

One-boson-exchange potential between T-doublet charmed-strange mesons that generates binding for selected J^PC channels.

If this is right

  • The 2+- state in the D_s1 bar D_s2* system provides an unambiguous experimental signal for an exotic hadron.
  • The 4++ state in D_s2* bar D_s2* represents a high-spin hadronic molecule.
  • The doubly-strange systems are flavor-exotic and cannot mix with conventional states.
  • Searches in appropriate production channels could establish the existence of these molecular states.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Similar molecular binding may occur when replacing charm with bottom quarks in analogous systems.
  • The model's predictions could be cross-checked against lattice QCD calculations of the same meson pairs.
  • If binding is confirmed, it suggests that other heavy-meson combinations might also form molecules not yet considered.

Load-bearing premise

The one-boson-exchange model is assumed to reliably determine binding without coupled-channel effects or other corrections when applied to these specific T-doublet meson pairs.

What would settle it

A search that finds no resonance near the D_s1 bar D_s1 threshold with J^PC=0++ or 2++, or that finds a state with the predicted mass but different quantum numbers, would challenge the binding predictions.

Figures

Figures reproduced from arXiv: 2606.01758 by Fu-Lai Wang, Xiang Liu.

Figure 1
Figure 1. Figure 1: FIG. 1: Characteristic spectrum of promising hidden-charm hidden [PITH_FULL_IMAGE:figures/full_fig_p010_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2: Characteristic spectrum of promising doubly-charm doubly [PITH_FULL_IMAGE:figures/full_fig_p011_2.png] view at source ↗
read the original abstract

In this work, we investigate whether the $T$-doublet charmed-strange mesons and their antiparticles can form hidden-charm hidden-strangeness molecular tetraquarks by applying the one-boson-exchange model. We identify $D_{s1}\bar D_{s1}$ ($J^{PC}=0^{++},\,1^{+-},\,2^{++}$), $D_{s1}\bar D_{s2}^*$ ($J^{PC}=1^{+\pm},\,2^{+\pm},\,3^{+\pm}$), and $D_{s2}^*\bar D_{s2}^*$ ($J^{PC}=0^{++},\,1^{+-},\,2^{++},\,3^{+-},\,4^{++}$) as promising hidden-charm hidden-strangeness molecular tetraquark candidates. Notably, the $D_{s1}\bar D_{s2}^*$ state with $J^{PC}=2^{+-}$ possesses exotic spin-parity quantum numbers forbidden for conventional mesons, providing a clean experimental signature for exotic hadrons. Moreover, the $D_{s2}^*\bar D_{s2}^*$ state with $J^{PC}=4^{++}$ is a rare high-spin hadronic molecule. We then extend the same framework to discuss the binding properties of the $T_s T_s$ systems and construct the mass spectrum of corresponding doubly-charm doubly-strangeness molecular tetraquarks. The promising candidates are $D_{s1}D_{s1}$ ($J^P=2^+$), $D_{s1}D_{s2}^*$ ($J^P=3^+$), and $D_{s2}^*D_{s2}^*$ ($J^P=4^+$), all of which are absolutely flavor-exotic. We encourage experimental searches for these predicted hadronic molecules, which would be a crucial step toward establishing doubly-charm molecular tetraquarks with strangeness $S=0$ or $2$.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The paper applies the one-boson-exchange (OBE) model to T-doublet charmed-strange mesons and their antiparticles to predict bound hidden-charm hidden-strangeness molecular tetraquarks. It identifies D_s1 bar D_s1 (J^PC=0++,1+-,2++), D_s1 bar D_s2* (J^PC=1+pm,2+pm,3+pm), and D_s2* bar D_s2* (J^PC=0++,1+-,2++,3+-,4++) states as promising candidates, highlighting the exotic 2+- quantum numbers in the second system and the high-spin 4++ state. The same framework is extended to T_s T_s systems, yielding predictions for doubly-charm doubly-strangeness molecular tetraquarks with promising candidates D_s1 D_s1 (J^P=2+), D_s1 D_s2* (J^P=3+), and D_s2* D_s2* (J^P=4+).

Significance. If the OBE single-channel results hold, the work supplies concrete, experimentally testable predictions for exotic hadrons, including a state with J^PC forbidden for conventional mesons and a rare high-spin molecule. The flavor-exotic S=2 predictions add to efforts to establish doubly-charm molecular tetraquarks. The manuscript follows standard OBE techniques in this subfield and provides a systematic mass spectrum for the extended systems.

major comments (2)
  1. [Formalism and numerical results sections] The central claim identifying the D_s1 bar D_s2* (J^PC=2+-) and other states as promising candidates (abstract; results for hidden-charm hidden-strangeness systems) is obtained by solving the Schrödinger equation in isolated channels with OBE potentials. The manuscript contains no estimate or discussion of coupled-channel mixing with nearby thresholds such as D_s bar D_s*, which directly affects whether the reported binding energies remain negative.
  2. [Extension to doubly-charm doubly-strangeness systems] The binding predictions and mass spectrum for the T_s T_s systems (D_s1 D_s1 (J^P=2+), etc.) rely on a single choice of cutoff and couplings without reported variation or sensitivity analysis. This leaves the robustness of the 'promising candidate' assignments untested against reasonable changes in the model parameters.
minor comments (2)
  1. [Abstract and tables] The pm notation for J^PC (e.g., 1^{+ m pm}) in the abstract and tables should be defined explicitly in the text or a footnote for clarity.
  2. [Introduction] A brief comparison paragraph with prior OBE studies of non-strange T-doublet systems would help place the new strangeness predictions in context.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the careful reading of our manuscript and the constructive comments. We address each major point below and are prepared to revise the manuscript accordingly to strengthen the presentation while preserving the core single-channel OBE predictions.

read point-by-point responses

  1. Referee: [Formalism and numerical results sections] The central claim identifying the D_s1 bar D_s2* (J^PC=2+-) and other states as promising candidates (abstract; results for hidden-charm hidden-strangeness systems) is obtained by solving the Schrödinger equation in isolated channels with OBE potentials. The manuscript contains no estimate or discussion of coupled-channel mixing with nearby thresholds such as D_s bar D_s*, which directly affects whether the reported binding energies remain negative.

    Authors: We agree that the analysis is performed strictly in the single-channel approximation, as is standard in OBE studies of molecular candidates. Coupled-channel mixing with thresholds such as D_s ar D_s^* is not included and could modify the binding energies. In the revised manuscript we will add an explicit discussion of this limitation in the formalism and results sections, noting that the reported states are candidates within the isolated-channel framework and that a full coupled-channel treatment lies beyond the present scope. revision: yes

  2. Referee: [Extension to doubly-charm doubly-strangeness systems] The binding predictions and mass spectrum for the T_s T_s systems (D_s1 D_s1 (J^P=2+), etc.) rely on a single choice of cutoff and couplings without reported variation or sensitivity analysis. This leaves the robustness of the 'promising candidate' assignments untested against reasonable changes in the model parameters.

    Authors: The cutoff and couplings are chosen for consistency with earlier OBE applications to related systems. To address robustness, the revised manuscript will include a sensitivity analysis in which the cutoff is varied over the conventional range employed in the literature, with the resulting changes to binding energies for the T_s T_s systems reported explicitly. revision: yes

Circularity Check

0 steps flagged

No significant circularity in derivation chain

full rationale

The paper applies the one-boson-exchange model to new T-doublet meson pairs, solving the Schrödinger equation in single channels to identify bound states as 'promising candidates.' No quoted steps reduce the central predictions to self-definitions, fitted inputs renamed as outputs, or load-bearing self-citations whose validity is internal to the present work. Model parameters and the OBE framework are treated as externally established inputs; the binding results for the listed J^PC states are generated outputs, not tautological with those inputs. This is the standard non-circular case for phenomenological model applications in the field.

Axiom & Free-Parameter Ledger

1 free parameters · 0 axioms · 0 invented entities

Central claim depends on applicability of one-boson-exchange model whose parameters are not specified here.

free parameters (1)
  • OBE model couplings and cutoff
    Standard free parameters in the model used to obtain binding; values not given in abstract.

pith-pipeline@v0.9.1-grok · 18224 in / 895 out tokens · 118103 ms · 2026-06-28T14:08:28.089736+00:00 · methodology

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Reference graph

Works this paper leans on

108 extracted references · 3 linked inside Pith

  1. [1]

    TheT- doublet charmed-strange mesons consist of theD s1 andD ∗ s2 [49], which share the same light-quark angular momentum jq =3/2

    Effective Lagrangians To derive the OBE effective potentials of theT s ¯T s sys- tems, we first construct the effective Lagrangians describing the couplings of theT-doublet charmed-strange mesons (and their antiparticles) to the light mesonsf 0,η, andϕ. TheT- doublet charmed-strange mesons consist of theD s1 andD ∗ s2 [49], which share the same light-quar...

  2. [2]

    The matrixV µ is Vµ =  ρ0 √ 2 + ω√ 2 ρ+ K∗+ ρ− − ρ0 √ 2 + ω√ 2 K∗0 K∗− ¯K∗0 ϕ  µ . Expanding the effective Lagrangians above yields the fol- lowing explicit expressions: LD1D1 f0 =−2g ′′ f0 D1aµDµ† 1a f0,(2.4) LD1D1P =− 5ik 3f π ϵµνρτvτD1bνD† 1aµ∂ρPba,(2.5) LD1D1V =− √ 2β′′gV (v·V ba) D1bµDµ† 1a +5 √ 2iλ′′gV 3 Dµ 1bDν† 1a −D ν 1b...

  3. [3]

    BothT-doublet charmed-strange mesons are isoscalars with strangenessS= −1, while their antiparticles carry strangenessS=1

    Flavor and spin-orbital wave functions The flavor part of the wave function is determined by the quantum numbers of the constituents. BothT-doublet charmed-strange mesons are isoscalars with strangenessS= −1, while their antiparticles carry strangenessS=1. Conse- quently, theT s ¯T s systems have total strangenessS=0 and total isospinI=0. For theD s1 ¯Ds1...

  4. [4]

    OBE effective potentials In the following, we derive the OBE effective potentials of theT s ¯T s systems. The derivation consists of three main steps [2]: (i) For a given transitionAB→CD, the scattering ampli- tudeM AB→CD E (q) is obtained from the interaction ver- tices and the propagator of the exchanged mesonE: iMAB→CD E (q)=iΓ ACE P(q,m E)iΓ BDE ,(2.2...

  5. [5]

    The corresponding numerical results, obtained from the coupled-channel Schr ¨odinger equation including theS-D wave mixing effect, are listed in Table II

    The D s1 ¯Ds1 system We now analyze the bound state properties of theD s1 ¯Ds1 system for threeJ PC quantum-numbers: 0 ++, 1 +−, and 2++. The corresponding numerical results, obtained from the coupled-channel Schr ¨odinger equation including theS-D wave mixing effect, are listed in Table II. TABLE II: Bound state properties of theD s1 ¯Ds1 system. The cut...

  6. [6]

    This system offers a richer spectrum of the spin-parity quantum numbers due to the presence of a spin-2 mesonD ∗ s2 alongside a spin-1 me- sonD s1

    The D s1 ¯D∗ s2 system We now proceed to analyze the bound state properties of theD s1 ¯D∗ s2 system within the single-channel framework, in- corporating theS-Dwave mixing effect. This system offers a richer spectrum of the spin-parity quantum numbers due to the presence of a spin-2 mesonD ∗ s2 alongside a spin-1 me- sonD s1. The numerical results for six...

  7. [7]

    We strongly recommend experimental searches for these Ds1 ¯D∗ s2 molecular tetraquarks near 5.08–5.10 GeV , slightly below theD s1 ¯D∗ s2 threshold

  8. [8]

    Since this system consists of two spin-2 mesons, it offers access to even higher total angular momenta

    The D ∗ s2 ¯D∗ s2 system We now investigate the bound state properties of theD∗ s2 ¯D∗ s2 system. Since this system consists of two spin-2 mesons, it offers access to even higher total angular momenta. Using the single-channel approximation with theS-Dwave mix- ing effect, we obtain the numerical results for five quantum- numbers (0++, 1+−, 2 ++, 3+−, and...

    2023

  9. [9]

    Liu, An overview ofXYZnew particles, Chin

    X. Liu, An overview ofXYZnew particles, Chin. Sci. Bull. 59, 3815 (2014)

    2014

  10. [10]

    H. X. Chen, W. Chen, X. Liu, and S. L. Zhu, The hidden- charm pentaquark and tetraquark states, Phys. Rep.639, 1 (2016)

    2016

  11. [11]

    Hosaka, T

    A. Hosaka, T. Iijima, K. Miyabayashi, Y . Sakai, and S. Yasui, Exotic hadrons with heavy flavors:X,Y,Z, and related states, Prog. Theor. Exp. Phys.2016, 062C01 (2016)

    2016

  12. [12]

    J. M. Richard, Exotic hadrons: review and perspectives, Few Body Syst.57, 1185-1212 (2016)

    2016

  13. [13]

    R. F. Lebed, R. E. Mitchell, and E. S. Swanson, Heavy-quark QCD exotica, Prog. Part. Nucl. Phys.93, 143-194 (2017)

    2017

  14. [14]

    S. L. Olsen, T. Skwarnicki, and D. Zieminska, Nonstan- dard heavy mesons and baryons: Experimental evidence, Rev. Mod. Phys.90, 015003 (2018)

    2018

  15. [15]

    F. K. Guo, C. Hanhart, U. G. Meißner, Q. Wang, Q. Zhao, and B. S. Zou, Hadronic molecules, Rev. Mod. Phys.90, 015004 (2018)

    2018

  16. [16]

    Y . R. Liu, H. X. Chen, W. Chen, X. Liu, and S. L. Zhu, Pen- taquark and tetraquark states, Prog. Part. Nucl. Phys.107, 237 (2019)

    2019

  17. [17]

    Brambilla, S

    N. Brambilla, S. Eidelman, C. Hanhart, A. Nefediev, C. P. Shen, C. E. Thomas, A. Vairo, and C. Z. Yuan, TheXYZ states: Experimental and theoretical status and perspectives, Phys. Rep.873, 1 (2020)

    2020

  18. [18]

    L. Meng, B. Wang, G. J. Wang, and S. L. Zhu, Chiral per- turbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules, Phys. Rept.1019, 1-149 (2023)

    2023

  19. [19]

    H. X. Chen, W. Chen, X. Liu, Y . R. Liu, and S. L. Zhu, An updated review of the new hadron states, Rept. Prog. Phys.86, 026201 (2023)

    2023

  20. [20]

    M. Z. Liu, Y . W. Pan, Z. W. Liu, T. W. Wu, J. X. Lu, and L. S. Geng, Three ways to decipher the nature of exotic hadrons: Multiplets, three-body hadronic molecules, and cor- relation functions, Phys. Rept.1108, 1-108 (2025)

    2025

  21. [21]

    Z. G. Wang, Review of the QCD sum rules for exotic states, Front. Phys. (Beijing)21, 016300 (2026)

    2026

  22. [22]

    X. Wang, X. Liu and Y . Gao, Colloquium: Hadron production in open-charm meson pairs ate +e− colliders, Rev. Mod. Phys. 98, 021001 (2026)

    2026

  23. [23]

    Z. Y . Bai, D. Y . Chen, Q. Huang, X. Liu, S. Q. Luo, and J. Z. Wang, Unquenched charmonium and beyond, arXiv:2602.19887

    arXiv

  24. [24]

    Aaijet al.[LHCb], Observation of a resonant structure near theD + s D− s threshold in theB + →D + s D− s K+ decay, Phys

    R. Aaijet al.[LHCb], Observation of a resonant structure near theD + s D− s threshold in theB + →D + s D− s K+ decay, Phys. Rev. Lett.131, 071901 (2023)

    2023

  25. [25]

    Aaltonenet al.[CDF], Evidence for a narrow near-threshold structure in theJ/ψϕmass spectrum inB + →J/ψϕK + decays, Phys

    T. Aaltonenet al.[CDF], Evidence for a narrow near-threshold structure in theJ/ψϕmass spectrum inB + →J/ψϕK + decays, Phys. Rev. Lett.102, 242002 (2009)

    2009

  26. [26]

    T. Ji, X. K. Dong, M. Albaladejo, M. L. Du, F. K. Guo, and J. Nieves, Establishing the heavy quark spin and light flavor molecular multiplets of theX(3872),Z c(3900), andX(3960), Phys. Rev. D106, 094002 (2022)

    2022

  27. [27]

    Mutuk, Molecular interpretation ofX(3960) asD + s D− s state, Eur

    H. Mutuk, Molecular interpretation ofX(3960) asD + s D− s state, Eur. Phys. J. C82, 1142 (2022)

    2022

  28. [28]

    Q. Xin, Z. G. Wang, and X. S. Yang, Analysis of theX(3960) and related tetraquark molecular states via the QCD sum rules, AAPPS Bull.32, 37 (2022)

    2022

  29. [29]

    Bayar, A

    M. Bayar, A. Feijoo, and E. Oset,X(3960) seen inD + s D− s as theX(3930) state seen inD +D−, Phys. Rev. D107, 034007 (2023)

    2023

  30. [30]

    Z. M. Ding and J. He, Combined analysis on nature of X(3960),χ c0(3930), andX 0(4140), Eur. Phys. J. C83, 806 (2023)

    2023

  31. [31]

    F. Z. Peng, M. J. Yan, and M. Pavon Valderrama, Heavy- and light-flavor symmetry partners of theT + cc(3875), theX(3872), and theX(3960) from light-meson exchange saturation, Phys. Rev. D108, 11 (2023)

    2023

  32. [32]

    S. S. Agaev, K. Azizi, and H. Sundu, Near-threshold structures in theD + s D− s mass distribution of the decayB + →D + s D− s K+, Phys. Rev. D107, 094018 (2023)

    2023

  33. [33]

    Y . Chen, H. Chen, C. Meng, H. R. Qi, and H. Q. Zheng, On the nature ofX(3960), Eur. Phys. J. C83, 381 (2023)

    2023

  34. [34]

    J. J. Qi, Z. Y . Wang, Z. F. Zhang, and X. H. Guo, The proper- ties of theS-waveD s ¯Ds bound state, Chin. Phys. C50, 022001 (2026)

    2026

  35. [35]

    Mahajan,Y(4140): Possible options, Phys

    N. Mahajan,Y(4140): Possible options, Phys. Lett. B679, 228-230 (2009)

    2009

  36. [36]

    G. J. Ding, Possible Molecular states ofD ∗ s ¯D∗ s system and Y(4140), Eur. Phys. J. C64, 297-308 (2009)

    2009

  37. [37]

    Branz, T

    T. Branz, T. Gutsche, and V . E. Lyubovitskij, Hadronic molecule structure of theY(3940) andY(4140), Phys. Rev. D 80, 054019 (2009)

    2009

  38. [38]

    R. M. Albuquerque, M. E. Bracco, and M. Nielsen, A QCD sum rule calculation for theY(4140) narrow structure, Phys. Lett. B678, 186-190 (2009)

    2009

  39. [39]

    Molina and E

    R. Molina and E. Oset, TheY(3940),Z(3930) and theX(4160) as dynamically generated resonances from the vector-vector interaction, Phys. Rev. D80, 114013 (2009)

    2009

  40. [40]

    Liu, OddballY(4140) as the molecular cousin ofY(3930), Chin

    X. Liu, OddballY(4140) as the molecular cousin ofY(3930), Chin. Phys. C34, 1405-1407 (2010)

    2010

  41. [41]

    J. R. Zhang and M. Q. Huang, (Q¯s) (∗)( ¯Qs)(∗) molecular states from QCD sum rules: A view onY(4140), J. Phys. G37, 025005 (2010)

    2010

  42. [42]

    Liu and S

    X. Liu and S. L. Zhu,Y(4143) is probably a molecular partner ofY(3930), Phys. Rev. D80, 017502 (2009); [Phys. Rev. D 85, 019902 (2012)]

    2009

  43. [43]

    Z. G. Wang, Reanalysis of theY(3940),Y(4140),Z c(4020), Zc(4025) andZ b(10650) as molecular states with QCD sum rules, Eur. Phys. J. C74, 2963 (2014)

    2014

  44. [44]

    X. Chen, X. L ¨u, R. Shi, and X. Guo, Mass ofY(4140) in 13 Bethe-Salpeter equation for quarks, arXiv:1512.06483

    Pith/arXiv arXiv

  45. [45]

    Aaijet al.[LHCb], Observation ofJ/ψϕstructures con- sistent with exotic states from amplitude analysis ofB + → J/ψϕK+ decays, Phys

    R. Aaijet al.[LHCb], Observation ofJ/ψϕstructures con- sistent with exotic states from amplitude analysis ofB + → J/ψϕK+ decays, Phys. Rev. Lett.118, 022003 (2017)

    2017

  46. [46]

    Jiaet al.[Belle], Observation of a vector charmonium- like state ine +e− →D + s Ds1(2536)− +c.c., Phys

    S. Jiaet al.[Belle], Observation of a vector charmonium- like state ine +e− →D + s Ds1(2536)− +c.c., Phys. Rev. D100, 111103 (2019)

    2019

  47. [47]

    Aaijet al.[LHCb], Observation of new resonances decay- ing toJ/ψK + andJ/ψϕ, Phys

    R. Aaijet al.[LHCb], Observation of new resonances decay- ing toJ/ψK + andJ/ψϕ, Phys. Rev. Lett.127, 082001 (2021)

    2021

  48. [48]

    S. I. Finazzo, M. Nielsen, and X. Liu, QCD sum rule calcula- tion for the charmonium-like structures in theJ/ψϕandJ/ψω invariant mass spectra, Phys. Lett. B701, 101-106 (2011)

    2011

  49. [49]

    X. Liu, Z. G. Luo, and S. L. Zhu, Novel charmonium-like structures in theJ/ψϕandJ/ψωinvariant mass spectra, Phys. Lett. B699, 341-344 (2011); [Phys. Lett. B707, 577 (2012)]

    2011

  50. [50]

    He and P

    J. He and P. L. L ¨u, UnderstandingY(4274) andX(4320) in theJ/ψϕinvariant mass spectrum, Nucl. Phys. A919, 1-14 (2013)

    2013

  51. [51]

    He, Understanding spin parity ofP c(4450) andY(4274) in a hadronic molecular state picture, Phys

    J. He, Understanding spin parity ofP c(4450) andY(4274) in a hadronic molecular state picture, Phys. Rev. D95, 074004 (2017)

    2017

  52. [52]

    H. W. Ke, X. H. Liu, and X. Q. Li, Study on the possible molecular state composed ofD ∗ s ¯Ds1 within the Bethe-Salpeter framework, Chin. Phys. C44, 093104 (2020)

    2020

  53. [53]

    J. He, Y . Liu, J. T. Zhu, and D. Y . Chen,Y(4626) as a molec- ular state from interactionD ∗ s ¯Ds1(2536)-Ds ¯Ds1(2536), Eur. Phys. J. C80, 246 (2020)

    2020

  54. [54]

    F. Z. Peng, M. J. Yan, M. S ´anchez S ´anchez, and M. Pavon Valderrama, Light- and heavy-quark symmetries and the Y(4230),Y(4360),Y(4500),Y(4620), andX(4630) reso- nances, Phys. Rev. D107, 016001 (2023)

    2023

  55. [55]

    X. D. Yang, F. L. Wang, Z. W. Liu, and X. Liu, Newly ob- servedX(4630): a new charmoniumlike molecule, Eur. Phys. J. C81, 807 (2021)

    2021

  56. [56]

    Z. G. Wang, Assignments of theX(4140),X(4500),X(4630), andX(4685) based on the QCD sum rules, Adv. High Energy Phys.2021, 4426163 (2021)

    2021

  57. [57]

    Navaset al.(Particle Data Group), Review of particle physics, Phys

    S. Navaset al.(Particle Data Group), Review of particle physics, Phys. Rev. D110, 030001 (2024)

    2024

  58. [58]

    X. Q. Li and X. Liu, A possible global group structure for exotic states, Eur. Phys. J. C74, 3198 (2014)

    2014

  59. [59]

    Karliner and J

    M. Karliner and J. L. Rosner, New exotic meson and baryon resonances from doubly-heavy hadronic molecules, Phys. Rev. Lett.115, 122001 (2015)

    2015

  60. [60]

    Aaijet al.[LHCb], Observation of an exotic narrow doubly charmed tetraquark, Nature Phys.18, 751-754 (2022)

    R. Aaijet al.[LHCb], Observation of an exotic narrow doubly charmed tetraquark, Nature Phys.18, 751-754 (2022)

    2022

  61. [61]

    Aaijet al.[LHCb], Study of the doubly charmed tetraquark T + cc, Nature Commun.13, 3351 (2022)

    R. Aaijet al.[LHCb], Study of the doubly charmed tetraquark T + cc, Nature Commun.13, 3351 (2022)

    2022

  62. [62]

    Molina, T

    R. Molina, T. Branz, and E. Oset, A new interpretation for the D∗ s2(2573) and the prediction of novel exotic charmed mesons, Phys. Rev. D82, 014010 (2010)

    2010

  63. [63]

    A. V . Manohar and M. B. Wise, ExoticQQ¯q¯qstates in QCD, Nucl. Phys. B399, 17-33 (1993)

    1993

  64. [64]

    T. E. O. Ericson and G. Karl, Strength of pion exchange in hadronic molecules, Phys. Lett. B309, 426-430 (1993)

    1993

  65. [65]

    N. A. Tornqvist, From the deuteron to deusons, an analysis of deuteronlike meson-meson bound states, Z. Phys. C61, 525- 537 (1994)

    1994

  66. [66]

    Janc and M

    D. Janc and M. Rosina, TheT cc =DD ∗ molecular state, Few Body Syst.35, 175-196 (2004)

    2004

  67. [67]

    G. J. Ding, J. F. Liu, and M. L. Yan, Dynamics of hadronic molecule in one-boson exchange approach and possible heavy flavor molecules, Phys. Rev. D79, 054005 (2009)

    2009

  68. [68]

    Ohkoda, Y

    S. Ohkoda, Y . Yamaguchi, S. Yasui, K. Sudoh, and A. Hosaka, Exotic mesons with double charm and bottom flavor, Phys. Rev. D86, 034019 (2012)

    2012

  69. [69]

    N. Li, Z. F. Sun, X. Liu, and S. L. Zhu, Coupled-channel analysis of the possibleD (∗)D(∗), ¯B(∗) ¯B(∗) andD (∗) ¯B(∗) molec- ular states, Phys. Rev. D88, 114008 (2013)

    2013

  70. [70]

    H. Xu, B. Wang, Z. W. Liu, and X. Liu,DD ∗ potentials in chiral perturbation theory and possible molecular states, Phys. Rev. D99, 014027 (2019)

    2019

  71. [71]

    L. Tang, B. D. Wan, K. Maltman, and C. F. Qiao, Dou- bly heavy tetraquarks in QCD sum rules, Phys. Rev. D101, 094032 (2020)

    2020

  72. [72]

    M. Z. Liu, T. W. Wu, M. Pavon Valderrama, J. J. Xie, and L. S. Geng, Heavy-quark spin and flavor symmetry partners of theX(3872) revisited: What can we learn from the one boson exchange model?, Phys. Rev. D99, 094018 (2019)

    2019

  73. [73]

    Z. M. Ding, H. Y . Jiang, and J. He, Molecular states from D(∗) ¯D(∗)/B(∗) ¯B(∗) andD (∗)D(∗)/ ¯B(∗) ¯B(∗) interactions, Eur. Phys. J. C80, 1179 (2020)

    2020

  74. [74]

    M. B. Wise, Chiral perturbation theory for hadrons containing a heavy quark, Phys. Rev. D45, R2188 (1992)

    1992

  75. [75]

    G. J. Ding, AreY(4260) andZ + 2 (4250)D 1DorD 0D∗ hadronic molecules? Phys. Rev. D79, 014001 (2009)

    2009

  76. [76]

    H. Y . Cheng and K. C. Yang, Charmless hadronicBdecays into a tensor meson, Phys. Rev. D83, 034001 (2011)

    2011

  77. [77]

    Casalbuoni, A

    R. Casalbuoni, A. Deandrea, N. Di Bartolomeo, R. Gatto, F. Feruglio, and G. Nardulli, Light vector resonances in the effectsive chiral Lagrangian for heavy mesons, Phys. Lett. B 292, 371 (1992)

    1992

  78. [78]

    Casalbuoni, A

    R. Casalbuoni, A. Deandrea, N. Di Bartolomeo, R. Gatto, F. Feruglio, and G. Nardulli, Phenomenology of heavy meson chiral Lagrangians, Phys. Rep.281, 145 (1997)

    1997

  79. [79]

    T. M. Yan, H. Y . Cheng, C. Y . Cheung, G. L. Lin, Y . C. Lin, and H. L. Yu, Heavy quark symmetry and chiral dynamics, Phys. Rev. D46, 1148 (1992); [Phys. Rev. D55, 5851E (1997)]

    1992

  80. [80]

    Bando, T

    M. Bando, T. Kugo, and K. Yamawaki, Nonlinear realization and hidden local symmetries, Phys. Rep.164, 217 (1988)

    1988

Showing first 80 references.