Possible strange hidden-charm pentaquarks from and interactions

Chen, Rui; He, Jun; Liu, Xiang

doi:10.1088/1674-1137/41/10/103105

Cited by 92 publications

(56 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The observation of these P c resonances also stimulated the arguments for more possible pentaquarks [67][68][69][70][71]. Productions of another N * and Λ * cc were discussed in Ref.…”

Section: Introductionmentioning

confidence: 83%

Hidden-charm pentaquarks and their hidden-bottom and Bc -like partner states

Liu

Chen

et al. 2017

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

In the framework of the color-magnetic interaction, we have systematically studied the mass splittings of the possible hidden-charm pentaquarks qqqcc (q = u, d, s) where the three light quarks are in a color-octet state. We find that i) the LHCb Pc states fall in the mass region of the studied system; ii) most pentaquarks should be broad states since their S-wave open-charm decays are allowed while the lowest state is the J P = 1 2 − Λ-like pentaquark with probably the suppressed ηcΛ decay mode only; and iii) the J P = 5 2 − states do not decay through S-wave and their widths are not so broad. The masses and widths of the two LHCb Pc baryons are compatible with such pentaquark states. We also explore the hidden-bottom and Bc-like partners of the hidden-charm states and find the possible existence of the pentaquarks which are lower than the relevant hadronic molecules.

show abstract

“…The observation of these P c resonances also stimulated the arguments for more possible pentaquarks [67][68][69][70][71]. Productions of another N * and Λ * cc were discussed in Ref.…”

Section: Introductionmentioning

confidence: 83%

Hidden-charm pentaquarks and their hidden-bottom and Bc -like partner states

Liu

Chen

et al. 2017

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the past year, the P c (4380) and P c (4450) have been studied by various methods and models in order to explain their nature. There are many possible interpretations, such as meson-baryon molecules [12][13][14][15][16][17][18][19][20][21][22][23], compact diquark-diquark-antiquark pentaquarks [24][25][26][27], compact diquark-triquark pentaquarks [28,29], genuine multiquark states other than molecules [30][31][32][33][34][35], and kinematical effects related to thresholds and triangle singularity [36][37][38][39][40], etc. Their productions and decay properties are also interesting [41][42][43][44][45][46][47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Revisiting hidden-charm pentaquarks from QCD sum rules

Xiang

Chen

et al. 2019

Chinese Phys. C

View full text Add to dashboard Cite

We revisit the hidden-charm pentaquark states Pc(4380) and Pc(4450) using the method of QCD sum rules by requiring the pole contribution to be larger than or around 30% to better insure the one-pole parametrization to be valid. We find two mixing currents and our results suggest that the Pc(4380) and Pc(4450) can be identified as hidden-charm pentaquark states having J P = 3/2 − and 5/2 + , respectively, while there still exist other possible spin-parity assignments, such as J P = 3/2 + and J P = 5/2 − , which needs to be clarified in further theoretical and experimental studies.All the local hidden-charm pentaquark interpolating currents have been systematically constructed in Refs. [57,58], and some of them were selected to perform QCD sum rule analyses. The results suggest that the P c (4380) and P c (4450) can be interpreted as hidden-charm pentaquark states composed of anticharmed mesons and charmed baryons. However, the analyses therein use one criterion which is not optimized, that is to require the pole contribution to be larger than 10% to insure the one-pole parametrization to be valid. This value is not so significant, and accordingly, the question arises whether we can find a larger pole contribution to better insure the one-pole parametrization?In the present study we try to answer this question in order to find better (more reliable) QCD sum rule results. Especially, we find the following two mixing currents: * ] channels, etc.

show abstract

“…Study of the pentaquark study has been revived after recent observations of hidden-charmed P c (4380) and P c (4450) at LHCb [3]. Many interpretations of the internal structure of LHCb pentaquarks have been proposed and other possible pentaquarks are also discussed in the literature [4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Nucleon resonances N(1875) and N(2100) as strange partners of the LHCb pentaquarks

He¹

2017

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

In this work, we investigate the possibility of interpreting two nucleon resonances, the N(1875) and the N(2100), as hadronic molecular states from the Σ * K and ΣK * interactions, respectively. With the help of effective Lagrangians in which coupling constants are determined by the SU(3) symmetry, the Σ * K and ΣK * interactions are described by the vector-meson and pseudoscalar-meson exchanges. With the one-boson-exchange potential obtained, bound states from the Σ * K and ΣK * interactions are searched for in a quasipotential BetheSaltpeter equation approach. A bound state with quantum number I(J P ) = 1/2(3/2 − ) is produced from the Σ * K interaction, which can be identified as the N(1875) listed in PDG. It can be seen as a strange partner of the LHCb pentaquark P c (4380) with the same quantum numbers in the molecular state picture. The ΣK * interaction also produces a bound state with quantum number I(J P ) = 1/2(3/2 − ), which is related to experimentally observed N(2100) in the φ photoproduction. Our results suggest that the N(2120) observed in the KΛ(1520) photoproduction and the N(2100) observed in the φ photoproduction have different origins. The former is a conventional three-quark state while the latter is a ΣK * molecular state, which can be seen as a strange partner of the P c (4450) with different spin parity. I. INTRODUCTIONThe pentaquark is an important topic of hadron physics. Its history can be tracked back to the birth of the quark model. The Θ particle with a mass of about 1540 MeV claimed by the LEPS Collaboration started a worldwide rush of the pentaquark study in both experiment and theory [1]. More precise experiments did not confirm the LEPS observation, which made people lose enthusiasm about the pentaquark [2]. Study of the pentaquark study has been revived after recent observations of hidden-charmed P c (4380) and P c (4450) at LHCb [3]. Many interpretations of the internal structure of LHCb pentaquarks have been proposed and other possible pentaquarks are also discussed in the literature [4][5][6][7][8][9][10][11][12][13][14].The hadronic molecular state picture is one of the most important interpretations to explain LHCb pentaquarks as other resonance structures which cannot be put into a conventional quark model [4][5][6][7][8]. Since the P c (4380) and P c (4450) are close to the Σ * c D and Σ c D * thresholds, it is natural to relate two LHCb pentaquarks to the Σ * c D and Σ c D * interactions. In Ref.[5], a calculation in a quasipotential Bethe-Salpeter approach suggested that a bound state with quantum number J P = 3/2 − and a bound state with 5/2 + can be produced from the Σ * c D and the Σ c D * interactions, respectively. It is consistent with the experimental observation about the hiddencharmed pentaquarks at LHCb. The P c (4450) is a P-wave state in this picture, and an explicit study in Ref. [6] showed that the S-wave state from the same interaction is located around the P c (4380), which suggests that the P c (4380) may be a mixing state from two interactions. Genera...

show abstract

Possible strange hidden-charm pentaquarks from and interactions

Cited by 92 publications

References 88 publications

Hidden-charm pentaquarks and their hidden-bottom and Bc -like partner states

Hidden-charm pentaquarks and their hidden-bottom and Bc -like partner states

Revisiting hidden-charm pentaquarks from QCD sum rules

Nucleon resonances N(1875) and N(2100) as strange partners of the LHCb pentaquarks

Contact Info

Product

Resources

About