Structure and decays of hidden heavy pentaquarks

Gutsche, Thomas; Lyubovitskij, Valery E.

doi:10.1103/physrevd.100.094031

Cited by 57 publications

(53 citation statements)

References 145 publications

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“…It's noted that the hidden-charm pentaquark mass spectra in this work is slightly higher than the three narrow pentaquark-like states, P c (4312) + , P c (4440) + and P c (4457) + measured by LHCb. The predicted values of 4483 and 4495 MeV for the lowest hidden-charm pentaquark in the [21] lying below the threshold of a single bottom baryon and B(B * ) mesons, which is consistent with other work [40]. The newly observed P c states by the LHCb collaboration have been largely interpreted as hadronic molecule states since there are abundant charmed meson and charmed baryon thresholds available [26].…”

Section: Light Quark Spectrumsupporting

confidence: 88%

Pentaquark components in low-lying baryon resonances

Kaewsnod

Zhao

et al. 2020

Phys. Rev. D

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We study pentaquark states of both light q 4q and hidden heavy q 3 QQ (q = u,d,s quark in SU(3) flavor symmetry; Q = c, b quark) systems with a general group theory approach in the constituent quark model, and the spectrum of light baryon resonances in the ansatz that the l = 1 baryon states may consist of the q 3 as well as q 4q pentaquark component. The model is fitted to ground state baryons and light baryon resonances which are believed to be normal three-quark states. The work reveals that the N (1535)1/2 − and N (1520)3/2 − may consist of a large q 4q component while the N (1895)1/2 − and N (1875)3/2 − are respectively their partners, and the N + (1685) might be a q 4q state. By the way, a new set of color-spin-flavor-spatial wave function for q 3 QQ systems in the compact pentaquark picture are constructed systematically for studying hidden charm pentaquark states. *

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Section: Light Quark Spectrumsupporting

confidence: 88%

Pentaquark components in low-lying baryon resonances

Kaewsnod

Zhao

et al. 2020

Phys. Rev. D

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“…The mass and decay properties of the P b ð11080Þ state predicted in Ref. [35] are also consistent with the prediction about a N Ã ð11100Þ state in Ref. [27].…”

Section: Introductionsupporting

confidence: 86%

“…Such similarity has been found in the comparison between the states Z b ð10610Þ and Z b ð10650Þ in the bottom sector and the states Z c ð3900Þ and Z c ð4020Þ in the charm sector. Based on such justification, many predictions about the hidden-bottom pentaquarks have been given within different theoretical models [27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…Because such states are still not observed in experiment, we need the theoretical decay width to make the prediction. One notices that in a recent paper [35], the authors predicted a series of hidden-bottom pentaquark states based on the observed three P c states within the hadron molecular state model, and the decay widths of these states into the ϒp channel were also provided in their work. The mass and decay properties of the P b ð11080Þ state predicted in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Systematic study of the production of hidden-bottom pentaquarks via γp and π−p scatterings

Wang

Chen

2020

Phys. Rev. D

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In this work, the production of hidden-bottom pentaquark P b states via γp and π − p scatterings is studied within an effective Lagrangian approach and the vector-meson-dominance mechanism. For the P b production in the process γp → ϒp, the dipole Pomeron model is employed to calculate the background contribution, and the experimental data can be well described. For the process π − p → ϒn, the Reggeized t-channel with π exchange is considered as the main background for the P b production. The cross section from the t-channel π exchange is very small due to weak coupling of P b state to the ππ channel predicted theoretically. Near the threshold, two-peak structure from the states P b ð11080Þ and P b ð11125Þ can be observed if energy bin width is chosen as 0.01 GeV, and the same result is obtained in the π − p scattering. Moreover, by taking the branching ratio of Br½P b → πN ≃ 0.05%, the numerical result shows that the average value of the cross section from the P b ð11080Þ state produced in the γp or π − p scattering reaches at least 0.1 nb with a bin of 0.1 GeV. Even if we reduce the branching ratio of the P b state into πN channel by one order, the theoretical average of the cross section from P b ð11080Þ production in π − p scattering can reach the order of 0.01 nb with a bin of 0.1 GeV, which means that the signal can still be clearly distinguished from the background. The experimental measurements and studies on the hidden-bottom pentaquark P b state production in the γp or π − p scattering near-threshold energy region around W ≃ 11 GeV are strongly suggested, which are accessible at COMPASS and JPARC. Particularly, the result of the photoproduction suggests that it is very promising to observe the hidden-bottom pentaquark at the proposed EicC facility in China.

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“…So far, how to make a direct connection between the calculations on the quark degrees of freedom and on the hadron degrees of freedom is still an open question. Moreover, one may also notice that the calculated branching ratios vary from tens of percentages [20] to even 0.03% [33] in the literature. It is necessary to pin down which one is more meaningful.…”

Section: Numerical Resultsmentioning

confidence: 99%

Selected strong decays of pentaquark State $$P_c(4312)$$ in a chiral constituent quark model

et al. 2020

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The newly confirmed pentaquark state Pc(4312) has been treated as a weakly bound (ΣcD) state by a well-established chiral constituent quark model and by a dynamical calculation on quark degrees of freedom where the quark exchange effect is accounted for. The obtained mass 4308 MeV agrees with data. In this work, the selected strong decays of the Pc(4312) state are studied with the obtained wave function. It is shown that the width of the ΛcD * decay is overwhelmed and the branching ratios of the p ηc and p J/ψ decays are both less than 1 percentage.

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Structure and decays of hidden heavy pentaquarks

Cited by 57 publications

References 145 publications

Pentaquark components in low-lying baryon resonances

Pentaquark components in low-lying baryon resonances

Systematic study of the production of hidden-bottom pentaquarks via γp and π−p scatterings

Selected strong decays of pentaquark State $$P_c(4312)$$ in a chiral constituent quark model

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