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doi:10.1103/physrevd.96.032004

Cited by 94 publications

(92 citation statements)

References 49 publications

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“…The Lanzhou group pointed out that this resonance structure is the missing higher charmonium ψ(4S ) [61]. By analyzing updated e + e − → π + π − ψ(3686) data from Belle [62], the group again emphasized that the missing ψ(4S ) may exist in the e + e − → π + π − ψ(3686) process [63], which was confirmed by the BESIII result of e + e − → π + π − ψ(3686) [64]. In Ref.…”

mentioning

confidence: 84%

Constructing J/ψ family with updated data of charmoniumlike Y states

et al. 2019

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Based on the updated data of charmoniumlike state Y(4220) reported in the hidden-charm channels of the e + e − annihilation, we propose a 4S -3D mixing scheme to categorize Y(4220) into the J/ψ family. We find that the present experimental data can support this charmonium assignment to Y(4220). Thus, Y(4220) plays a role of a scaling point in constructing higher charmonia above 4 GeV. To further test this scenario, we provide more abundant information on the decay properties of Y(4220), and predict its charmonium partner ψ(4380), whose evidence is found by analyzing the e + e − → ψ(3686)π + π − data from BESIII. If Y(4220) is indeed a charmonium, we must face how to settle the established charmonium ψ(4415) in the J/ψ family. In this work, we may introduce a 5S -4D mixing scheme, and obtain the information of the resonance parameters and partial open-charm decay widths of ψ(4415), which do not contradict the present experimental data. Additionally, we predict a charmonium partner ψ(4500) of ψ(4415), which can be accessible at future experiments, especially, BESIII and BelleII. The studies presented in this work provide new insights to establish the higher charmonium spectrum.PACS numbers: I. INTRODUCTIONIn 1974, J/ψ particle was discovered by the E598 [1] Collaboration in the p + Be → e + + e − + x reaction and the SLAC-SP-017 Collaboration [2] in the e + e − annihilation at the same time. The observation of J/ψ confirmed the existence of a charm quark predicted by the Glashow-Iliopoulos-Maiani mechanism [3]. Since then, a series of charmoniumlike states, ψ(3686) [4], ψ(3770) [5], ψ(4040) [6], ψ(4160) [7], and ψ(4415) [8], were reported, which construct a main body of the observed charmonium spectrum as shown in Particle Data Group (PDG) [9]. In Fig. 1, we collect the corresponding information of the observed charmonia with the year for their first discoveries. It is obvious that the year 1978 is an important time point since most of charmonia listed in the latest PDG were announced.Under this experimental background, the Cornell model was proposed by Eichten et al. [18,19], where the Cornell potential V(r) = −k/r + r/a 2 composed of Coulomb-type and linear potentials, which depicts the interaction between charm and anticharm quarks, was postulated and applied to study the observed charmonia [20]. As a successful phenomenological model, the Cornell model can describe the observed charmonia at that time. Inspired by the Cornell model, different potential models were developed by various groups [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Among these, a famous one is the Godfrey-Isgur (GI) model [34], which has semi-relativistic expression of the kinetic and potential energy terms. The GI model was employed to quan- * Electronic address:

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Constructing J/ψ family with updated data of charmoniumlike Y states

et al. 2019

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“…Lastly, we do not consider in this work the broad 1 −− J/ψ π + π − resonance Y (4008) claimed by Belle [42], as it has not been seen by other experiments, particularly in the precise scan of BESIII [38]. We also do not consider the charged [40] and neutral [43] charmoniumlike ψ(2S)π "structures" observed by BESIII around 4035 MeV, which may be the same as Z c (4055) [30]. [30] to lie in mass above Zc(4020) and below Zc(4430).…”

Section: Experimental Review Of Relevant Statesmentioning

confidence: 98%

“…Indeed, the BESIII numbers for Y (4260) actually agree rather well with those given in Table II for Y (4230), which is especially true now that the current values extracted from χ c0 ω have been updated [39]: m = 4218.5 ± 4.3 MeV and Γ = 28.2±4.2 MeV. Similarly, the BESIII mass measurements ascribed to Y (4360) give two widely separated values, 4320±13 MeV for e + e − → J/ψ π + π − [38] versus 4386±4 MeV for e + e − → ψ(2S)π + π − [40].…”

Section: Experimental Review Of Relevant Statesmentioning

confidence: 99%

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Spectrum of p -wave hidden-charm exotic mesons in the diquark model

Giron

Lebed

2020

Phys. Rev. D

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We study the fine structure in the spectrum of known and predicted negative-parity hidden-charm exotic meson states, which comprise the lowest P -wave multiplet in the dynamical diquark model. Starting with a form previously shown to successfully describe the S-wave states, we develop a 5parameter Hamiltonian that includes spin-orbit and tensor terms. After discussing the experimental status of the observed J P C = 1 −− states Y with respect to masses and decay modes (classified by eigenvalues of heavy-quark spin), we note a number of inconsistencies between measurements from different experiments that complicate a unique determination of the spectrum. Outlining a variety of scenarios for interpreting the Y data, we perform fits to each one, obtaining results that demonstrate differing possibilities for the P -wave spectra. Choosing one of these fits for illustration, we predict masses for all 28 isomultiplets in this 1P multiplet, compare the results to tantalizing hints in the data, and discuss the rich discovery potential for new states.

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“…Finally, BESIII found an explanation of the strange lineshape as the two overlapping states, the Y (4220) and Y (4360), decaying to common final state, the lighter one Y (4220) was found to be lighter and narrower than the Y (4260). The BES results for the e + e − → ψ(2S)π + π − [23] and e + e − → h c π + π − [24] cross sections are no less intriguing. In both cross sections BESIII demonstrated the presence of the same Y (4220) and Y (4390) states as in the J/ψπ + π − case.…”

Section: Vector Charmoniumlike Statesmentioning

confidence: 99%