Is Pcs(4459) one state or two?


  • Chu-Wen Xiao Central South University
  • J. Nieves Centro Mixto Universidad de Valencia-CSIC
  • E. Oset Centro Mixto Universidad de Valencia-CSIC
  • J. J. Wu University of Chinese Academy of Sciences (UCAS)
  • B. S. Zou Central South University



Pentaquark state, heavy quark spin symmetry, coupled channel


The LHCb collaboration reported recently a charm-strange pentaquark state Pcs(4459) found in the J/ψΛ invariant mass distribution. Using a coupled channel unitary approach combined with the local hidden gauge formalism, we investigate the D¯(∗)Ξ (∗,0) c interactions, together with the J/ψΛ and other coupled channels, with the constraints of the heavy quark spin symmetry. We dynamically reproduce the Pcs(4459) state in the coupled channel interactions, which is a degenerate state of D¯ ∗Ξc and analogous to the Pc(4450) state before. Furthermore, we make more predictions for future experiments.


J. J. Wu, R. Molina, E. Oset and B. S. Zou, Prediction of narrow N ∗ and Λ ∗ resonances with hidden charm above 4 GeV, Phys. Rev. Lett. 105 (2010) 232001,

J. J. Wu, R. Molina, E. Oset and B. S. Zou, Dynamically generated N ∗ and Λ ∗ resonances in the hidden charm sector around 4.3 GeV, Phys. Rev. C 84 (2011) 015202,

W. L. Wang, F. Huang, Z. Y. Zhang and B. S. Zou, ΣcD¯ and ΛcD¯ states in a chiral quark model, Phys. Rev. C 84 (2011) 015203,

Z. C. Yang, Z. F. Sun, J. He, X. Liu and S. L. Zhu, The possible hidden-charm molecular baryons composed of anti-charmed meson and charmed baryon, Chin. Phys. C 36 (2012) 6,,10.1088/1674-1137/36/3/006.

S. G. Yuan, K. W. Wei, J. He, H. S. Xu and B. S. Zou, Study of qqqcc¯ five quark system with three kinds of quark-quark hyperfine interaction, Eur. Phys. J. A 48 (2012) 61,

J. J. Wu, T.-S. H. Lee and B. S. Zou, Nucleon Resonances with Hidden Charm in Coupled-Channel Models, Phys. Rev. C 85 (2012) 044002,

C. García-Recio, J. Nieves, O. Romanets, L. L. Salcedo and L. Tolos, Hidden charm N and Delta resonances with heavyquark symmetry, Phys. Rev. D 87, (2013) 074034,

C. W. Xiao, J. Nieves and E. Oset, Combining heavy quark spin and local hidden gauge symmetries in the dynamical generation of hidden charm baryons, Phys. Rev. D 88 (2013) 056012,

T. Uchino, W. H. Liang and E. Oset, Baryon states with hidden charm in the extended local hidden gauge approach, Eur. Phys. J. A 52 (2016) 43,

M. Karliner and J. L. Rosner, New Exotic Meson and Baryon Resonances from Doubly-Heavy Hadronic Molecules, Phys. Rev. Lett. 115 (2015) 122001,

R. Aaij et al. [LHCb], Observation of J/ψp Resonances Consistent with Pentaquark States in Λ 0 b → J/ψK−p Decays, Phys. Rev. Lett. 115 (2015) 072001,

R. Aaij et al. [LHCb], Study of the production of Λ 0 b and B 0 hadrons in pp collisions and first measurement of the Λ 0 b → J/ψpK− branching fraction, Chin. Phys. C 40 (2016) 011001,

R. Aaij et al. [LHCb], Model-independent evidence for J/ψp contributions to Λ 0 b → J/ψpK− decays, Phys. Rev. Lett. 117 (2016) 082002,

R. Aaij et al. [LHCb], Evidence for exotic hadron contributions to Λ 0 b → J/ψpπ− decays, Phys. Rev. Lett. 117 (2016) 082003,

R. Aaij et al. [LHCb Collaboration], Observation of a narrow pentaquark state, Pc(4312)+, and of two-peak structure of the Pc(4450)+, Phys. Rev. Lett. 122 (2019) 222001,

L. Roca and E. Oset, On the hidden charm pentaquarks in Λb → J/ψK−p decay, Eur. Phys. J. C 76 (2016) 591,

C. W. Shen, J. J. Wu and B. S. Zou, Decay behaviors of possible Λcc¯ states in hadronic molecule pictures, Phys. Rev. D 100 (2019) 056006 ,

C. W. Xiao, J. Nieves and E. Oset, Prediction of hidden charm strange molecular baryon states with heavy quark spin symmetry, Phys. Lett. B 799 (2019) 135051,

N. Isgur and M. B. Wise, Weak Decays of Heavy Mesons in the Static Quark Approximation, Phys. Lett. B 232 (1989) 113,

M. Neubert, Heavy quark symmetry, Phys. Rept. 245 (1994) 259,

A.V. Manohar and M.B. Wise, Heavy Quark Physics, Cambridge Monographs on Particle Physics, Nuclear Physics and Cosmology, Vol. 10 (Cambridge University Press, Cambridge, England, 2000).

E. Santopinto and A. Giachino, Compact pentaquark structures, Phys. Rev. D 96 (2017) 014014,

R. Chen, J. He and X. Liu, Possible strange hidden-charm pentaquarks from Σ (∗) c D¯ ∗ s and Ξ ( 0 ,∗) c D¯ ∗ interactions, Chin. Phys. C 41 (2017) 103105,

B. Wang, L. Meng and S. L. Zhu, Spectrum of the strange hidden charm molecular pentaquarks in chiral effective field theory, Phys. Rev. D 101 (2020) 034018,

H. X. Chen, L. S. Geng, W. H. Liang, E. Oset, E. Wang and J. J. Xie, Looking for a hidden-charm pentaquark state with strangeness S = −1 from Ξ − b decay into J/ ψ K − Λ, Phys. Rev. C 93 (2016) 065203,

A. Feijoo, V. K. Magas, A. Ramos and E. Oset, A hiddencharm S = −1 pentaquark from the decay of Λb into J/ψ, ηΛ states, Eur. Phys. J. C 76 (2016) 446,

J. X. Lu, E. Wang, J. J. Xie, L. S. Geng and E. Oset, The Λb → J/ψK0Λ reaction and a hidden-charm pentaquark state with strangeness, Phys. Rev. D 93 (2016) 094009,

R. Aaij et al. [LHCb], Evidence of a J/ψΛ structure and observation of excited Ξ − states in the Ξ − b → J/ψΛK− decay, Sci. Bull. 66 (2021) 1278,

H. X. Chen, W. Chen, X. Liu and X. H. Liu, Establishing the first hidden-charm pentaquark with strangeness, Eur. Phys. J. C 81 (2021) 409,

Z. G. Wang, Analysis of the Pcs(4459) as the hidden-charm pentaquark state with QCD sum rules, Int. J. Mod. Phys. A 36 (2021) 2150071,

K. Azizi, Y. Sarac and H. Sundu, Investigation of Pcs(4459)0 pentaquark via its strong decay to ΛJ/Ψ, Phys. Rev. D 103 (2021) 094033,

U. Ozdem, Magnetic dipole moments of the hidden-charm pentaquark states: Pc(4440), Pc(4457) and Pcs(4459), Eur. Phys. J. C 81 (2021) 277,

F. Z. Peng, M. J. Yan, M. Sánchez Sánchez and M. P. Valderrama, The Pcs(4459) pentaquark from a combined effective field theory and phenomenological perspectives, Eur. Phys. J. C 81 (2021) 666,

R. Chen, Can the newly reported Pcs(4459) be a strange hidden-charm ΞcD¯ ∗ molecular pentaquark?, Phys. Rev. D 103 (2021) 054007,

R. Chen, Strong decays of the newly Pcs(4459) as a strange hidden-charm ΞcD¯ ∗ molecule, Eur. Phys. J. C 81 (2021) 122,

M. Z. Liu, Y. W. Pan and L. S. Geng, Can discovery of hidden charm strange pentaquark states help determine the spins of Pc(4440) and Pc(4457)?, Phys. Rev. D 103 (2021) 034003,

J. T. Zhu, L. Q. Song and J. He, Pcs(4459) and other possible molecular states from Ξ (∗) c D¯(∗) and Ξ 0 cD¯(∗) interactions, Phys. Rev. D 103 (2021) 074007,

W. Y. Liu, W. Hao, G. Y. Wang, Y. Y. Wang, E. Wang and D. M. Li, Resonances X(4140), X(4160), and Pcs(4459) in the decay of Λb → J/ψΛφ, Phys. Rev. D 103 (2021) 034019,

H. X. Chen, W. Chen, X. Liu and S. L. Zhu, The hiddencharm pentaquark and tetraquark states, Phys. Rept. 639 (2016) 1,

A. Hosaka, T. Iijima, K. Miyabayashi, Y. Sakai and S. Yasui, Exotic hadrons with heavy flavors: X, Y, Z, and related states, PTEP 2016 (2016) 062C01,

H. X. Chen, W. Chen, X. Liu, Y. R. Liu and S. L. Zhu, A review of the open charm and open bottom systems, Rept. Prog. Phys. 80 (2017) 076201,

R. F. Lebed, R. E. Mitchell and E. S. Swanson, Heavy-Quark QCD Exotica, Prog. Part. Nucl. Phys. 93 (2017) 143,

A. Esposito, A. Pilloni and A. D. Polosa, Multiquark Resonances, Phys. Rept. 668 (2016) 1,

F. K. Guo, C. Hanhart, U.-G. Meißner, Q. Wang, Q. Zhao and B. S. Zou, Hadronic molecules, Rev. Mod. Phys. 90 (2018) 015004,

A. Ali, J. S. Lange and S. Stone, Exotics: Heavy Pentaquarks and Tetraquarks, Prog. Part. Nucl. Phys. 97 (2017) 123,

S. L. Olsen, T. Skwarnicki and D. Zieminska, Nonstandard heavy mesons and baryons: Experimental evidence, Rev. Mod. Phys. 90 (2018) 015003,

M. Karliner, J. L. Rosner and T. Skwarnicki, Multiquark States, Ann. Rev. Nucl. Part. Sci. 68 (2018) 17,

C. Z. Yuan, The XYZ states revisited, Int. J. Mod. Phys. A 33 (2018) 1830018,

Y. R. Liu, H. X. Chen, W. Chen, X. Liu and S. L. Zhu, Pentaquark and Tetraquark states, Prog. Part. Nucl. Phys. 107 (2019) 237,

N. Brambilla, S. Eidelman, C. Hanhart, A. Nefediev, C. P. Shen, C. E. Thomas, A. Vairo and C. Z. Yuan, The XY Z states: experimental and theoretical status and perspectives, Phys. Rept. 873 (2020) 1,

C. W. Xiao, J. J. Wu and B. S. Zou, Molecular nature of Pcs(4459) and its heavy quark spin partners, Phys. Rev. D 103 (2021) 054016,

J. A. Oller and E. Oset, Chiral symmetry amplitudes in the S wave isoscalar and isovector channels and the σ, f0(980), a0(980) scalar mesons, Nucl. Phys. A 620 (1997) 438, [erratum: Nucl. Phys. A 652 (1999) 407,]

E. Oset and A. Ramos, Nonperturbative chiral approach to s wave anti-K N interactions, Nucl. Phys. A 635 (1998) 99,

J. A. Oller and U.-G. Meißner, Chiral dynamics in the presence of bound states: Kaon nucleon interactions revisited, Phys. Lett. B 500 (2001) 263,

M. Bando, T. Kugo, S. Uehara, K. Yamawaki and T. Yanagida, Is rho Meson a Dynamical Gauge Boson of Hidden Local Symmetry?, Phys. Rev. Lett. 54 (1985) 1215,

M. Bando, T. Kugo and K. Yamawaki, Nonlinear Realization and Hidden Local Symmetries, Phys. Rept. 164 (1988) 217,

U.-G. Meißner, Low-Energy Hadron Physics from Effective Chiral Lagrangians with Vector Mesons, Phys. Rept. 161 (1988) 213,

H. Nagahiro, L. Roca, A. Hosaka and E. Oset, Hidden gauge formalism for the radiative decays of axial-vector mesons, Phys. Rev. D 79 (2009) 014015,

X. K. Dong, F. K. Guo and B. S. Zou, A survey of heavy-antiheavy hadronic molecules, Progr. Phys. 41 (2021) 65,

X. K. Dong, F. K. Guo and B. S. Zou, Explaining the Many Threshold Structures in the Heavy-Quark Hadron Spectrum, Phys. Rev. Lett. 126 (2021) 152001,

C. W. Xiao, J. Nieves and E. Oset, Heavy quark spin symmetric molecular states from D¯(∗)Σ (∗) c and other coupled channels in the light of the recent LHCb pentaquarks, Phys. Rev. D 100 (2019) 014021,

C. W. Xiao, J. X. Lu, J. J. Wu and L. S. Geng, How to reveal the nature of three or more pentaquark states, Phys. Rev. D 102 (2020) 056018,

T. Sekihara and T. Hyodo, Size measurement of dynamically generated hadronic resonances with finite boxes, Phys. Rev. C 87 (2013) 045202, [arXiv:1209.0577 [nucl-th]].

H. A. Ahmed and C. W. Xiao, Study the molecular nature of σ, f0(980), and a0(980) states, Phys. Rev. D 101 (2020) 094034,




How to Cite

Xiao C-W, Nieves J, Oset E, Wu JJ, Zou BS. Is Pcs(4459) one state or two?. Supl. Rev. Mex. Fis. [Internet]. 2022 Jun. 11 [cited 2024 May 20];3(3):0308045 1-7. Available from: