Recently observed 
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 as molecular states and possible mixture of 
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Xu, Hao; Li, Qiang; Chang, C. C.; Wang, Guoli

doi:10.1103/physrevd.101.054037

Cited by 37 publications

(21 citation statements)

References 91 publications

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“…, respectively, because of their closeness to the thresholds of the respective channels [39][40][41][42][43][44][45][46][47][48][49][50][51], but there are some other assignments for the components ofD ðÃÞ Σ ðÃÞ c and the spin-parity quantum numbers [40,41,[50][51][52][53][54][55][56][57][58]. Note that heavy quark spin symmetry (HQSS) [59,60] predicts seven bound states in the single channel treatment of Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In the compact diquark model [61], P c ð4312Þ is explained as an S-wave diquark-diquark-antiquark state with J P ¼ 3 2 − , P c ð4440Þ, and P c ð4457Þ as P-wave states with J P ¼ 3 2 þ and J P ¼ 5 2 þ . Moreover, starting from the effective Lagrangians respecting chiral and heavy quark symmetry in the Bethe-Salpeter framework [50], two P c ð4457Þ states are predicted with spin parities of J P ¼ 3 2…”

Section: Introductionmentioning

confidence: 99%

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How to reveal the nature of three or more pentaquark states

Xiao

et al. 2020

Phys. Rev. D

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Within the chiral unitary approach and with the constraints of heavy quark spin symmetry, we study the coupled channel interactions ofD ðÃÞ Σ ðÃÞ c channels, close to whose thresholds three pentaquarklike P c states have been reported by the LHCb Collaboration. In the present work, we take into account the contributions of pion exchanges via box diagrams to the interaction potentials, and therefore lift the degeneracy in the masses ofD Ã Σ ðÃÞ c spin multiplets. Fitting the J=ψp invariant mass distributions in the Λ 0 b → J=ψK − p decay, we find that the LHCb pentaquark states cannot be reproduced in the direct J=ψp production in the Λ 0 b decay, and can only be indirectly produced in the final state interactions of the Λ 0 b decay products,D ðÃÞ Σ ðÃÞ c , which further supports the nature of these states asD ðÃÞ Σ c molecules. Based on the fit results obtained, we study the partial decay widths/branching ratios to the other decay channels,D Ã Λ c ,DΛ c , and η c N, and the corresponding invariant mass distributions. The resonances with J P ¼ 1 2 − , P c ð4312Þ, P c ð4440Þ and the one ofD Ã Σ Ã c around 4500 MeV, have large partial decay width into η c N, and thus can be easily seen in the η c N invariant mass distributions. By contrast, the states with J P ¼ 3 2 − , P c ð4457Þ, the (predicted) narrow P c ð4380Þ, and the bound state ofD Ã Σ Ã c with a mass of about 4520 MeV do not decay into η c N. Therefore, the η c N channel should be studied in the future to provide further insights into the nature of these states, especially that of P c ð4440Þ and P c ð4457Þ.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

How to reveal the nature of three or more pentaquark states

Xiao

et al. 2020

Phys. Rev. D

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“…Given the fact that P c ð4312Þ is located 9.8 MeV below theDΣ c threshold, and P c ð4440Þ and P c ð4457Þ are 21.8 and 4.8 MeV below theD Ã Σ c one, they provide the most robust candidates so far for hadronic molecules. 1 Indeed, a large number of theoretical works have been performed within the molecular picture, focusing on various aspects ranging from mass spectroscopy [26][27][28][29][30][31][32][33][34][35][36][37][38][39] and decay widths [40][41][42][43][44][45] to production mechanisms [46][47][48][49][50]. In our previous work, we adopted the contact range effective field theory (EFT) to describe the three pentaquark states in the hadronic molecular picture, and we showed the emergence of a complete multiplet of hadronic molecules in the meson-baryon system [26], dictated by heavy quark spin symmetry (HQSS) [51,52], which has later been corroborated by many studies [26,30,32,33,35,53].…”

Section: Introductionmentioning

confidence: 99%

Triply charmed dibaryons in the one boson exchange model

2020

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The pentaquark states, P c ð4312Þ, P c ð4440Þ, and P c ð4450Þ, can be nicely arranged into a multiplet of seven molecules ofD ðÃÞ Σ ðÃÞ c dictated by heavy quark spin symmetry, while the Ξ ðÃÞ cc Σ ðÃÞ c system can be related to theD ðÃÞ Σ ðÃÞ c system via heavy antiquark diquark symmetry. In this work, we employ the oneboson exchange model to study the interactions between Ξ ðÃÞ cc and Σ ðÃÞ c with constraints from the pentaquark system. We show that a multiplet of ten triply charmed dibaryons emerge naturally in the isospin-1=2 sector, while only three appear in the isospin-3=2 sector. In addition, we study their heavy quark flavor partners. Ten triply bottom diybaryons are found in the isospin-1=2 sector, while only nine are likely in the isospin-3=2 sector. Furthermore, the predicted mass splitting between the 0 þ Ξ cc Σ c state and its 1 þ counterpart is found to be consistent with the correlation implied by heavy antiquark diquark symmetry recently pointed out in Pan et al..

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“…Although observed in the J=ψp channel, the proximity of the mass of the P þ c ð4312Þ to the Σ þ cD 0 threshold (4318 MeV) and of the masses of P þ c ð4440Þ and P þ c ð4457Þ to the Σ þ cD Ã0 threshold (4460 MeV), favored a molecular S-wave interpretation of the Σ þ c þD 0 and Σ þ c þD Ã0 systems respectively [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In such an interpretation, the binding arises via meson exchanges between point particles and in the elastic channel all resonances acquire a negative parity.…”

Section: Introductionmentioning

confidence: 99%

Exploring the spectrum of the hidden charm strange pentaquark in the SU(4) version of the flavor-spin model

Stancu

2020

Phys. Rev. D

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We study the spectrum of the isoscalar pentaquark udscc, of either positive or negative parity, in a constituent quark model with linear confinement and a flavor-spin hyperfine interaction previously extended to SU(4) and used to describe the spectrum of the uudcc pentaquarks observed at LHCb in 2019. For positive parity we make a distinction between the case where one unit of angular momentum is located in the subsystem of four quarks and the case where the angular momentum is located in the relative motion between a ground-state four-quark subsystem and the antiquark. The novelty is that we introduce the coupling between different flavor states, due to the breaking of exact SU(4)-flavor symmetry of the Hamiltonian model, both for positive-and negative-parity states. An important consequence is that the lowest state, located at 4404 MeV, has quantum numbers J P ¼ 1=2 − while without coupling the lowest state has J P ¼ 1=2 þ or 3=2 þ .

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Recently observed Pc as molecular states and possible mixture of Pc(4457)

Cited by 37 publications

References 91 publications

How to reveal the nature of three or more pentaquark states

How to reveal the nature of three or more pentaquark states

Triply charmed dibaryons in the one boson exchange model

Exploring the spectrum of the hidden charm strange pentaquark in the SU(4) version of the flavor-spin model

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