Molecular interpretation of the 
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 sta

Burns, Timothy J.; Swanson, Eric S.

doi:10.1103/physrevd.100.114033

Cited by 98 publications

(65 citation statements)

References 75 publications

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“…[51] the likely existence of two peaks is proposed for the P c ð4457Þ state with J P ¼ 1 2 AE , whenDΛ c ð2595Þ is taken into account for its close threshold as first introduced and studied in Refs. [62,63]. By contrast, using the S-matrix approach and performing a systematic analysis of the reaction amplitudes, Fernández-Ramírez et al [64] explained P c ð4312Þ as a virtual state.…”

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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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%

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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“…In Ref. [13] it is shown that the usual molecular scenarios cannot explain the production rate of P c states in Λ b decays. Moreover, the paper points out the need to couple the Σ + c D * 0 and the Λ c (2595)D channels due to the very close proximity of their thresholds.…”

Section: Introductionmentioning

confidence: 99%

Spectrum of the $$uudc \bar{c}$$ hidden charm pentaquark with an SU(4) flavor-spin hyperfine interaction

Stancu

2019

Eur. Phys. J. C

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We study a few of the lowest states of the pentaquark uudcc, of positive and negative parity, in a constituent quark model with an SU(4) flavor-spin hyperfine interaction. For positive parity we introduce space wave functions of appropriate permutation symmetry with one unit of orbital angular momentum in the internal motion of the four-quark subsystem or an orbital excitation between the antiquark and the four quark subsystem which remains in the ground state. We show that the lowest positive parity states 1/2 + , 3/2 + are provided by the first alternative and are located below the 1/2 − and the 1/2 + states with all quarks in the ground state. We compare our results with the LHCb three narrow pentaquark structures reported in 2019.

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Molecular interpretation of the Pc(4440) and Pc(4457) sta

Cited by 98 publications

References 75 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

Spectrum of the $$uudc \bar{c}$$ hidden charm pentaquark with an SU(4) flavor-spin hyperfine interaction

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