Spectrum of fully-heavy tetraquarks from a diquark+antidiquark perspective

Bedolla, Marco A.; Ferretti, J.; Roberts, Craig D.; Santopinto, E.

doi:10.1140/epjc/s10052-020-08579-3

Cited by 113 publications

(52 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A wide range of theoretical descriptions of XY Z states is available. These interpretations include: (a) the compact tetraquark (or diquark-antidiquark) model [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]; (b) the meson-meson molecular model [28][29][30][31][32][33][34][35][36][37][38][39]; (c) the interpretation in terms of kinematic or threshold effects caused by a e-mail: jacopo.j.ferretti@jyu.fi (corresponding author) b e-mail: santopinto@ge.infn.it c e-mail: m.anwar@fz-juelich.de (corresponding author) d e-mail: luyu@hiskp.uni-bonn.de virtual particles [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]. Calculations of meson observables (like the spectrum or the decay widths) within the above pictures, when compared with t...…”

Section: Introductionmentioning

confidence: 99%

Quark structure of the $$\chi _{\mathrm{c}}(3P)$$ and X(4274) resonances and their strong and radiative decays

et al. 2020

Self Cite

View full text Add to dashboard Cite

We calculate the masses of χ c (3P) states with threshold corrections in a coupled-channel model. The model was recently applied to the description of the properties of χ c (2P) and χ b (3P) multiplets (Ferretti and Santopinto in Phys Lett B 789:550, 2019]. We also compute the open-charm strong decay widths of the χ c (3P) states and their radiative transitions. According to our predictions, the χ c (3P) states should be dominated by the charmonium core, but they may also show small meson-meson components. The X (4274) is interpreted as a cc χ c1 (3P) state. More information on the other members of the χ c (3P) multiplet, as well as a more rigorous analysis of the X (4274)'s decay modes, are needed to provide further indications on the quark structure of the previous resonance.

show abstract

Section: Introductionmentioning

confidence: 99%

Quark structure of the $$\chi _{\mathrm{c}}(3P)$$ and X(4274) resonances and their strong and radiative decays

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Note, too, that the predicted J P = 0 + bbbb state was confirmed by a diffusion Monte Carlo approach [64] and by a symmetry analysis [65]. The existence of bbbb tetraquark is supported by the relativized quark model [66], the non-relativistic quark model [67] and QCD sum rules [68]. This tetraquark state was estimated to be around 0.1 GeV below threshold in diquark-antidiquark configuration [69].…”

Section: Introductionmentioning

confidence: 78%

Tetra- and Penta-Quark Structures in the Constituent Quark Model

2020

View full text Add to dashboard Cite

With the development of high energy physics experiments, a large amount of exotic states in the hadronic sector have been observed. In order to shed some light on the nature of the tetraquark and pentaquark candidates, a constituent quark model, along with the Gaussian expansion method, has been employed systematically in real- and complex-range investigations. We review herein the double- and fully-heavy tetraquarks, but also the hidden-charm, hidden-bottom and doubly charmed pentaquarks. Several exotic hadrons observed experimentally were well reproduced within our approach; moreover, their possible compositeness and other properties, such as their decay widths and general patterns in the spectrum, are analyzed. Besides, we report also some theoretical predictions of tetra- and penta-quark states which have not seen by experiment yet.

show abstract

“…The spectra of the bb-bb bound states was also explored in Ref. [25]. We also present our predictions in Table 4.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Theoretical results on cc-cc bound states [9,10,25] indicate X (6900) maybe is the radial excited of 0 + , 1 + or 2 + cc-cc state. However, LHCb only reported two structures in the mass region of J/ψ pair between 6.2 to 7.4 GeV, which are less than the theoretical prediction for the number of possible states in cc-cc system.…”

Section: Summary and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Tetraquark state X(6900) and the interaction between diquark and antidiquark

Han

Liu

et al. 2021

Eur. Phys. J. C

View full text Add to dashboard Cite

Recently LHCb declared a new structure X(6900) in the final state di-$$J/\psi $$ J / ψ which is popularly regarded as a cc-$$\bar{c}\bar{c}$$ c ¯ c ¯ tetraquark state. Within the Bethe–Salpeter (B–S) framework we study the possible cc-$$\bar{c}\bar{c}$$ c ¯ c ¯ bound states and the interaction between diquark (cc) and antidiquark ($$\bar{c}\bar{c}$$ c ¯ c ¯ ). In this work cc ($$\bar{c}\bar{c}$$ c ¯ c ¯ ) is treated as a color anti-triplet (triplet) axial-vector so the quantum numbers of cc-$$\bar{c}\bar{c}$$ c ¯ c ¯ bound state are $$0^+$$ 0 + , $$1^+$$ 1 + and $$2^+$$ 2 + . Learning from the interaction in meson case and using the effective coupling we suggest the interaction kernel for the diquark and antidiquark system. Then we deduce the B–S equations for different quantum numbers. Solving these equations numerically we find the spectra of some excited states can be close to the mass of X(6900) when we assign appropriate values for parameter $$\kappa $$ κ introduced in the interaction (kernel). We also briefly calculate the spectra of bb-$$\bar{b}\bar{b}$$ b ¯ b ¯ bound states. Future measurement of bb-$$\bar{b}\bar{b}$$ b ¯ b ¯ state will help us to determine the exact form of effective interaction.

show abstract

Spectrum of fully-heavy tetraquarks from a diquark+antidiquark perspective

Abstract: Using a relativized diquark model Hamiltonian, we calculate the masses of $$J^{PC}=0^{++}$$ J PC = 0 + + ground-state tetraquarks in the following s… Show more

Cited by 113 publications

References 108 publications

Quark structure of the $$\chi _{\mathrm{c}}(3P)$$ and X(4274) resonances and their strong and radiative decays

Quark structure of the $$\chi _{\mathrm{c}}(3P)$$ and X(4274) resonances and their strong and radiative decays

Tetra- and Penta-Quark Structures in the Constituent Quark Model

Tetraquark state X(6900) and the interaction between diquark and antidiquark

Contact Info

Product

Resources

About