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000897427 1001_ $$0P:(DE-HGF)0$$aDong, Xiang-Kun$$b0
000897427 245__ $$aIs the existence of a J / ψ J / ψ bound state plausible?
000897427 260__ $$a[S.l.]$$bScience China Press$$c2021
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000897427 520__ $$aIn a recent measurement LHCb reported pronounced structures in the spectrum. One of the various possible explanations of those is that they emerge from non-perturbative interactions of vector charmonia. It is thus important to understand whether it is possible to form a bound state of two charmonia interacting through the exchange of gluons, which hadronise into two pions at the longest distance. In this paper, we demonstrate that, given our current understanding of hadron-hadron interactions, the exchange of correlated light mesons (pions and kaons) is able to provide sizeable attraction to the di- system, and it is possible for two mesons to form a bound state. As a side result we find from an analysis of the data for the transition including both and final state interactions an improved value for the transition chromo-electric polarisability: , where the uncertainty also includes the one induced by the final state interactions.
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000897427 7001_ $$0P:(DE-HGF)0$$aBaru, Vadim$$b1
000897427 7001_ $$0P:(DE-HGF)0$$aGuo, Feng-Kun$$b2$$eCorresponding author
000897427 7001_ $$0P:(DE-Juel1)131182$$aHanhart, Christoph$$b3$$ufzj
000897427 7001_ $$0P:(DE-HGF)0$$aNefediev, Alexey$$b4
000897427 7001_ $$0P:(DE-HGF)0$$aZou, Bing-Song$$b5
000897427 773__ $$0PERI:(DE-600)2816140-3$$a10.1016/j.scib.2021.09.009$$gp. S2095927321006265$$n21$$p2462$$tScience bulletin$$v66$$x2095-9273$$y2021
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