Study of charmoniumlike and fully-charm tetraquark spectroscopy

Zhao, Z. W.; Xu, Kai; Kaewsnod, Attaphon; Liu, Xuyang; Limphirat, A.; Yan, Yupeng

doi:10.1103/physrevd.103.116027

Cited by 42 publications

(20 citation statements)

References 58 publications

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“…The broad structure around 6400-6500 MeV lies at the upper limit of where models predict 1S ground states to occur (e.g., Refs. [26,27]). In LHCb's Model I [1], for example, the structure is treated as a superposition of (at least) two resonances, irrespective of quantum numbers.…”

Section: B Subsequent To the Lhcb Observationmentioning

confidence: 99%

All Heavy Tetraquarks: The Dynamical Diquark Model and Other Approaches

Lebed¹

2022

Preprint

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The 2020 announcement by LHCb of a narrow structure X(6900) in the di-J/ψ spectrum-a potential cccc state-has opened a new era in hadronic spectroscopy. In this talk, we briefly survey theory works preceding this event, examine key features of the observed spectrum, and then discuss how subsequent theory studies (including with the author's own dynamical diquark model) have interpreted these features. We conclude with proposals for experiments capable of distinguishing competing interpretations.

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Section: B Subsequent To the Lhcb Observationmentioning

confidence: 99%

All Heavy Tetraquarks: The Dynamical Diquark Model and Other Approaches

Lebed¹

2022

Preprint

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“…di-η c , di-J/ψ, di-η b , di-Υ(1S) and so on. Some works imply that there is no stable state below the corresponding threshold [8,16,18,20,21,[34][35][36], while some other works have opposite conclusion [11,13,14,16,17,19,30,[37][38][39][40][41][42][43]. Moreover, there are different interpretations of the nature of X(6900) state, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, there are different interpretations of the nature of X(6900) state, e.g. tetraquark [21,22,27,33,35,36,[44][45][46][47][48][49][50], gluonic tetracharm [51], or coupled channel effect [31,32,52]. Therefore, further study of QQ QQ system is still needed.…”

Section: Introductionmentioning

confidence: 99%

NLO results with operator mixing for fully heavy tetraquarks in QCD sum rules

Wu¹,

Zuo²,

Wang³

et al. 2022

Preprint

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We study the mass spectra of QQ QQ (Q = c, b) systems in QCD sum rules with the complete next-to-leading order (NLO) contribution to the pertabative QCD part of the correlation functions. Instead of meson-meson or diquark-diquark currents, we use diagonalized currents under operator renormalization. Numerical results show that the NLO corrections are very important for the QQ QQ system, because they not only give significant contributions but also reduce parameter dependence and makes Borel platform more distinct, especially for the bb bb in the MS scheme. We find that the operator mixing induced by NLO corrections is crucial to understand the color structure of the states. We use currents that have good perturbative convergence in our phenomenological analysis. We get three J P C = 0 ++ states, with masses 6.35 +0.20 −0.17 GeV, 6.56 +0.18 −0.20 GeV and 6.95 +0.21 −0.31 GeV, respectively. The first two seem to agree with the broad structure around 6.2 ∼ 6.8 GeV measured by the LHCb collaboration in the J/ψJ/ψ spectrum, and the third seems to agree with the narrow resonance X(6900). For the 2 ++ states we find one with mass 7.03 +0.22 −0.26 GeV, which is also close to that of X(6900), and another one around 7.3 GeV but with larger uncertainties.

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“…In this work, we apply the same model as our previous work [9] to predict the mass of all possible light tetraquark configurations. The paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

“…tions of color, spin, and spatial degrees of freedom of tetraquark states, and evaluate tetraquark mass spectra in the constituent quark model applied in previous works [9][10][11]. In Sec.…”

Section: Introductionmentioning

confidence: 99%

Study of light tetraquark spectroscopy

Zhao,

Xu,

Kaewsnod

et al. 2021

Preprint

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We calculate the mass of tetraquark states of all qq q q quark configurations in a constituent quark model where the Cornell-like potential and one-gluon exchange spin-spin coupling are employed. The three coupling parameters for the Cornell-like potential and one-gluon exchange spin-spin coupling are proposed mass-dependent in accordance with Lattice QCD data, and all model parameters are predetermined by studying light, charmed and bottom mesons. The theoretical predictions for light tetraquarks are compared with the observed exotic meson states in the light-unflavored meson sector, and tentative assignments are suggested. The work suggests that the f0(1500) and f0(1710) might be ground light tetraquark states with J = 0.

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Study of charmoniumlike and fully-charm tetraquark spectroscopy

Cited by 42 publications

References 58 publications

All Heavy Tetraquarks: The Dynamical Diquark Model and Other Approaches

All Heavy Tetraquarks: The Dynamical Diquark Model and Other Approaches

NLO results with operator mixing for fully heavy tetraquarks in QCD sum rules

Study of light tetraquark spectroscopy

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