Analysis of the charmonium-like states X*(3860), X(3872), X(3915), X(3930) and X(3940) according to their strong decay behaviors

Yu, Guo Liang; Wang, Zhi Gang; Li, Zhen Yu

doi:10.1088/1674-1137/42/4/043107

Cited by 15 publications

(14 citation statements)

References 62 publications

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“…This latter scenario is also supported in Ref. [9] and Ref. [10], where it is suggested that the X (3915) and X (3930) resonances arise as different decay mechanisms of the same 2 ++ state.…”

Section: Introductionsupporting

confidence: 53%

Analysis of the $$ \varvec{e^+ e^- \rightarrow J/\psi D{\bar{D}}}$$ reaction close to the threshold concerning claims of a $$\chi _{c0}(2P)$$ state

Wang

2021

Eur. Phys. J. A

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We analyze the $$D{\bar{D}}$$ D D ¯ mass distribution from a recent Belle experiment on the $$e^+e^- \rightarrow J/\psi D{\bar{D}}$$ e + e - → J / ψ D D ¯ reaction, and show that the mass distribution divided by phase space does not have a clear peak above the $$D{\bar{D}}$$ D D ¯ threshold that justifies the experimental claim of a $$\chi _{c0}(2P)$$ χ c 0 ( 2 P ) state from those data. Then we use a unitary formalism with coupled channels $$D^+D^-$$ D + D - , $$D^0{\bar{D}}^0$$ D 0 D ¯ 0 , $$D_s{\bar{D}}_s$$ D s D ¯ s , and $$\eta \eta $$ η η , with some of the interactions taken from a theoretical model, and use the data to fix other parameters. We then show that, given the poor quality of the data, we can get different fits leading to very different $$D{\bar{D}}$$ D D ¯ amplitudes, some of them supporting a $$D{\bar{D}}$$ D D ¯ bound state and others not. The main conclusion is that the claim for the $$\chi _{c0}(2P)$$ χ c 0 ( 2 P ) state, already included in the PDG, is premature, but refined data can provide very valuable information on the $$D{\bar{D}}$$ D D ¯ scattering amplitude. As side effects, we warn about the use of a Breit-Wigner amplitude parameterization close to threshold, and show that the $$D_s{\bar{D}}_s$$ D s D ¯ s channel plays an important role in this reaction.

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Section: Introductionsupporting

confidence: 53%

Analysis of the $$ \varvec{e^+ e^- \rightarrow J/\psi D{\bar{D}}}$$ reaction close to the threshold concerning claims of a $$\chi _{c0}(2P)$$ state

Wang

2021

Eur. Phys. J. A

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“…Bimetallic epoxide ring‐opening step is expected to operate in other epoxide copolymerizations. In addition, the bimetallic cooperative effect has also been observed in the polymerizations of cyclic esters . Therefore, we explored the use of multinuclear Co–salen complexes for epoxide/CA copolymerization .…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the bimetallic catalyst design has been applied to the development of polymerization catalysts . Well‐designed bimetallic catalysts were reported to demonstrate efficient chain propagation and/or production of unique polymer architectures in olefin polymerization, ring‐opening polymerization of cyclic esters, and so on.…”

Section: Introductionmentioning

confidence: 99%

Multinuclear cobalt-salen complexes with phenylene linker for epoxide polymerizations

Hiranoi

Hatanaka

Nakano

2017

J. Polym. Sci. Part A: Polym. Chem.

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Di‐ and trinuclear cobalt (Co)–salen complexes with a benzene ring as a rigid linker were explored for epoxide polymerizations. The dinuclear Co–salen complex with a 1,2‐phenylene linker showed higher catalytic activity than the dinuclear Co–salen complex with a 1,3‐phenylene linker and the trinuclear Co–salen complex with a 1,3,5‐benzenetriyl linker for the copolymerization of propylene oxide (PO) with carbon dioxide. A combination of the absolute configuration of the two Co–salen moieties was found to affect its catalytic activity. The optimized dinuclear Co–salen complex with a heterochiral combination demonstrated highest activity and maintained its catalytic activity under a low catalyst concentration. The heterochiral dinuclear Co–salen complex also showed high activity for the copolymerization of PO with cyclic anhydride. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 2150–2159

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“…[104] found a small width about 11 MeV for the χ c0 (2P) state [104], while the analysis of Ref. [30] in a 3 P 0 model obtained a large width of 110 ∼ 180 MeV. This suggests that further precise measurement of the X * (3860) and more theoretical studies of the χ c0 (2P) state are necessary.…”

Section: * (3860)mentioning

confidence: 93%

“…In 2009, as conventional charmonium states, the open-flavor strong decays of the newly observed resonances X(3915) and X(4350) were studied by Liu et al within the 3 P 0 model, the strong decay properties indicate that they may be assigned as χ c0 (2P) and χ c2 (3P), respectively [44]. Further studies of the open-flavor strong decays of P-wave charmonium states were also carried out within the 3 P 0 model by several groups in recent years [27][28][29][30]. It is found that X(3915) may be disfavored the assignment of χ c0 (2P) [27,28], the X(4140) may favor the χ c1 (3P) state [29], while the newly observed state X * (3860) can be a good candidate of χ c0 (2P) with a broad width [30].…”

Section: Introductionmentioning

confidence: 99%

Strong decays of higher charmonium states into open-charm meson pairs

Gui

Lü

et al. 2018

Phys. Rev. D

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The open-charm strong decays of higher charmonium states up to the mass of the 6P multiplet are systematically studied in the 3 P 0 model. The wave functions of the initial charmonium states are calculated in the linear potential (LP) and screened potential (SP) quark model. The decay widths for most of the well-established charmonium states above the open-charm thresholds can be reasonably described. By comparing our quark model calculations with the experimental observations we also discuss the nature of some of the newly observed charmonium-like states. It is found that (i) the ψ(4415) may favor the ψ(4S ) or ψ 1 (3D) assignment. There may exist two highly overlapping vector charmonium states around 4.4 GeV; (ii) In the LP model the J PC = 1 −− Y(4660) resonance and the J PC = 0 ++ X(4500) resonance may be assigned as the ψ(5S ) and χ c0 (4P), respectively; (iii) The newly observed state X * (3860) can be assigned as the χ c0 (2P) state with a narrow width of about 30 MeV; (iv) It seems to be difficult to accommodate the X(4140) and X(4274) states in the same potential model as excited χ c1 states. (v) The X(3940) resonance can be assigned as the η c (3S ) state; (vi) The vector charmonium-like states Y(4230/4260, 4360) and scalar X(4700) cannot be described by any conventional charmonium states self-consistently in our model. PACS numbers:

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Analysis of the charmonium-like states X*(3860), X(3872), X(3915), X(3930) and X(3940) according to their strong decay behaviors

Abstract: Analysis of the charmonium-like states X * (3860), X(3872), X(3915), X(3930) and X(3940) according to their strong decay behaviors * Guo-Liang Yu( ) 1;1) Zhi-Gang Wang( ) 1;2) Zhen-Yu Li( ) 2

Cited by 15 publications

References 62 publications

Analysis of the $$ \varvec{e^+ e^- \rightarrow J/\psi D{\bar{D}}}$$ reaction close to the threshold concerning claims of a $$\chi _{c0}(2P)$$ state

Analysis of the $$ \varvec{e^+ e^- \rightarrow J/\psi D{\bar{D}}}$$ reaction close to the threshold concerning claims of a $$\chi _{c0}(2P)$$ state

Multinuclear cobalt-salen complexes with phenylene linker for epoxide polymerizations

Strong decays of higher charmonium states into open-charm meson pairs

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