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 tetraquark resonances with lattice QCD potentials and the Born-Oppenheimer approximation

Bicudo, Pedro; Cardoso, Marco; Peters, Antje; Pflaumer, Martin; Wagner, Marc

doi:10.1103/physrevd.96.054510

Cited by 71 publications

(68 citation statements)

References 43 publications

(59 reference statements)

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“…The double-charm triquark system [[cq]c] 3 is expected to be dynamically similar to the double-charm antidiquark, {cc} 3 , as far as their color and masses are concerned. The role of the latter, forming an almost static source, has been discussed at great length in a number of papers for the doubly-heavy anti-baryons, such asΞ cc (=ccq), and tetraquarks T (ccqq) [33,[36][37][38][39][40][41]. The doubly-heavy triquark and the doubly-heavy diquark also differ in that the former has a light quark and the latter none.…”

Section: Doubly-heavy Triquark -Light Diquark Model Of Pentaquarkmentioning

confidence: 99%

Mass spectrum of the hidden-charm pentaquarks in the compact diquark model

Ali

Ahmed

Aslam

et al. 2019

J. High Energ. Phys.

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The LHCb collaboration have recently updated their analysis of the resonant J/ψ p mass spectrum in the decay Λ 0 b → J/ψ p K − , making use of their combined Run 1 and Run 2 data. In the updated analysis, three narrow states, P c (4440) + , P c (4457) + , and P c (4312) + , are observed. The spin-parity assignments of these states are not yet known. We interpret these narrow resonances as compact hidden-charm diquark-diquarkantiquark pentaquarks. Using an effective Hamiltonian, based on constituent quarks and diquarks, we calculate the pentaquark mass spectrum for the complete SU (3) F lowest Sand P -wave multiplets, taking into account dominant spin-spin, spin-orbit, orbital and tensor interactions. The resulting spectrum is very rich and we work out the quark flavor compositions, masses, and J P quantum numbers of the pentaquarks. However, heavy quark symmetry restricts the observable states in Λ b -baryon, as well as in the decays of the other weakly-decaying b-baryons, Ξ b and Ω b . In addition, some of the pentaquark states are estimated to lie below the J/ψ p threshold in Λ b -decays (and corresponding thresholds in Ξ b -and Ω b -decays). They decay via cc annihilation into light hadrons or a dilepton pair, and are expected to be narrower than the P c -states observed. We anticipate their discovery, as well as of the other pentaquark states present in the spectrum at the LHC, and in the long-term future at a Tera-Z factory.

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Section: Doubly-heavy Triquark -Light Diquark Model Of Pentaquarkmentioning

confidence: 99%

Mass spectrum of the hidden-charm pentaquarks in the compact diquark model

Ali

Ahmed

Aslam

et al. 2019

J. High Energ. Phys.

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“…Lattice QCD is a very important tool used by particle physicists to investigate the properties of baryons and mesons. Lattice techniques [1,2,3,4,5,6] are presently being employed to understand and elucidate the pentaquark and tetraquark observations made by Belle [7,8,9,10], BESIII [11,12], LHCb [13,14,15,16,17], and other collaborations. However, as the quark content increases, it becomes computationally expensive and time-intensive to do the lattice calculations.…”

Section: Introductionmentioning

confidence: 99%

Application of the Thomas Fermi quark model to multiquark mesons

Baral

Wilcox

2019

Nuclear Physics A

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The possibility of the existence of mesons with two or more quark-antiquark pairs is investigated with a new application of the Thomas-Fermi (TF) statistical quark model. Quark color couplings are treated in a mean field manner similar to a previous application to baryons, and short and concise expressions for energies are derived. We find that, on average, quarks only interact with antiquarks in such systems. The TF differential equation is constructed and systems with heavy-light quark content are examined. Three types of mesonic systems are defined. In the case of charm quarks, multicharmonium, multi-Z meson and multi-D meson family types are examined. System analogs for bottom quarks are also constructed. Quantitative trends for system energies of mesonic quark matter are extracted as a function of the number of quark pairs. We find indications from energy plots that multi-Z type mesons (and their bottom quark analogs) are actually stable for a range of quark number pairs. At this initial stage we have not yet included explicit spin interaction couplings between quarks, but we can take one level of degeneracy into account in our two-inequivalent TF function construction.

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“…Indeed, if tetraquarks, which are stable against strong and radiative decays, could be found in experiments, this would provide an irrefutable evidence of compact diquarks as building blocks of hadronic matter.The objects of our interest in this paper are the doublebottom J P = 1 + tetraquarks T {bb} [ūd] , and the related ones T {bb} [ūs] and T {bb} [ds] collected in Fig. 1, which have evoked lately a lot of theoretical and phenomenological interest [6][7][8][9][10][11], though the possibility of stable multiquark states was already pointed out a long time ago [12,13]. Likewise, estimates of the tetraquark masses with two heavy quarks carried out in quark models well over a decade ago also predicted stable tetraquarks [14].Concentrating on the T {bb} [ūd] state, which is a J P = 1 + , I = 0 tetraquark, consisting of the S-wave bound axialvector {bb} diquark and the scalar light [ūd] antidiquark, its mass is pitched at (10389 ± 21) MeV [6], lying about 215 MeV below the BB * threshold.…”

mentioning

confidence: 99%

Prospects of discovering stable double-heavy tetraquarks at a Tera-Z factory

et al. 2018

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baryons and tetraquarks may be viewed as diquark-quark and diquark-antidiquark objects, respectively, with the diquarks having well-defined color, spin and flavor quantum numbers. Indeed, if tetraquarks, which are stable against strong and radiative decays, could be found in experiments, this would provide an irrefutable evidence of compact diquarks as building blocks of hadronic matter.The objects of our interest in this paper are the doublebottom J P = 1 + tetraquarks T {bb} [ūd] , and the related ones T {bb} [ūs] and T {bb} [ds] collected in Fig. 1, which have evoked lately a lot of theoretical and phenomenological interest [6][7][8][9][10][11], though the possibility of stable multiquark states was already pointed out a long time ago [12,13]. Likewise, estimates of the tetraquark masses with two heavy quarks carried out in quark models well over a decade ago also predicted stable tetraquarks [14].Concentrating on the T {bb} [ūd] state, which is a J P = 1 + , I = 0 tetraquark, consisting of the S-wave bound axialvector {bb} diquark and the scalar light [ūd] antidiquark, its mass is pitched at (10389 ± 21) MeV [6], lying about 215 MeV below the BB * threshold. Other esti-

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udb¯b¯ tetraquark resonances with lattice QCD potentials and the Born-Oppenheimer approximation

Cited by 71 publications

References 43 publications

Mass spectrum of the hidden-charm pentaquarks in the compact diquark model

Mass spectrum of the hidden-charm pentaquarks in the compact diquark model

Application of the Thomas Fermi quark model to multiquark mesons

Prospects of discovering stable double-heavy tetraquarks at a Tera-Z factory

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