Charged charmoniumlike structures in the $$e^+ e^- \rightarrow \psi (3686) \pi ^+ \pi ^-$$ process based on the ISPE mechanism

Huang, Qi; Chen, Dian-Yong; Liu, Xiang; Matsuki, Takayuki

doi:10.1140/epjc/s10052-019-7121-9

Cited by 5 publications

(2 citation statements)

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“…Refs. [21,75,76] for the study of the πψ(2S) distribution). However, we have to note that the X(4055) ± is observed by the Belle Collaboration [77] and the mass is about 20 MeV larger than our result in Eq.…”

Section: −Immentioning

confidence: 99%

Investigation of the $X(4020)$ peak in the $D^\bar D^$ and $πh_c$ channels

Sakai

2021

Preprint

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In this paper, the nature of X( 4020) observed in the vicinity of the D * D * threshold of the πh c and D * D * distributions is studied. Using a model containing one bare-particle state with the πh c and D * D * one-loop self energies, we make a fit to the πh c and D * D * distributions of the e + e − → π + π − h c and e + e − → π − D * + D * 0 reactions reported by the BESIII Collaboration. It is found that both structures seen in the πh c and D * D * channels are described well with one resonantstate which can be associated with X(4020) while the obtained X(4020) mass and width are found to be larger than those in the latest PDG. We evaluate the scattering length and effective range of the S-wave D * D * pair with spin J = 1 related to the X(4020) properties which can be tested with model calculations or future lattice QCD study. Our analysis suggests that a large part of X(4020) may come from a bare-particle state originating from some short-range dynamics other than the D * D * channel.

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Section: −Immentioning

confidence: 99%

Investigation of the $X(4020)$ peak in the $D^\bar D^$ and $πh_c$ channels

Sakai

2021

Preprint

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“…Because of the situation as described above many studies have been devoted to the investigation of X(4260). 1 The suggestions given by these studies may be classified into three types: hadronic molecule [10][11][12][13][14][15]; cc state [16][17][18][19][20]; hybrid state [21,22]; or non-resonant enhancement [23].…”

Section: Introductionmentioning

confidence: 99%

On leptonic width of X(4260)

Cao

Xue

et al. 2021

Eur. Phys. J. C

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New measurements on cross sections in $$e^+e^-\rightarrow J/\psi \pi ^+\pi ^-$$ e + e - → J / ψ π + π - , $$h_c\pi ^+\pi ^-$$ h c π + π - , $$D^0D^{*-}\pi ^++c.c.$$ D 0 D ∗ - π + + c . c . , $$\psi (2S)\pi ^+\pi ^-$$ ψ ( 2 S ) π + π - , $$\omega \chi _{c0}$$ ω χ c 0 and $$J/\psi \eta $$ J / ψ η channels have been carried out by BESIII, Belle and BABAR experiments, as well as in the $$D_s^{*+}D_s^{*-}$$ D s ∗ + D s ∗ - channel. We perform extensive numerical analyses by combining all these data available, together with those in $$D^+D^{*-}+c.c.$$ D + D ∗ - + c . c . and $$D^{*+}D^{*-}$$ D ∗ + D ∗ - channels. Though the latter show no evident peak around $$\sqrt{s}=4.230$$ s = 4.230 GeV, the missing X(4260) is explained as that it is concealed by the interference effects of the well established charmonia $$\psi (4040)$$ ψ ( 4040 ) , $$\psi (4160)$$ ψ ( 4160 ) and $$\psi (4415)$$ ψ ( 4415 ) . Our analyses reveal that the leptonic decay width of X(4260) ranges from $$\mathcal {O}(10^2)$$ O ( 10 2 ) eV to $$\mathcal {O}(1)$$ O ( 1 ) keV, and hence it is probably explained in the conventional quark model picture. That is, the X(4260) may well be interpreted as a mixture of $$4^3S_1$$ 4 3 S 1 and $$3^3D_1$$ 3 3 D 1 ($$2^3D_1$$ 2 3 D 1 ) states.

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