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The Study Of Ds*(?)s1 Hadronic Molecular State Based On The X(4630)

Posted on:2022-03-24Degree:MasterType:Thesis
Country:ChinaCandidate:X D YangFull Text:PDF
GTID:2480306725453704Subject:physics
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Since the discovery of X(3872)in 2003,a large number of X/Y/Z/Pc states have been found experimentally.Because the property of these exotic states is different from predicted by the theory of the quark model,which has inspired great interest of theorists.The study of exotic states also helps to improve our understanding of non-perturbative QCD.The discovery of Pc states has greatly promoted the theoretical and experimental research.Similarly to the Pc states discovery process,a series of exotic states have been observed in the decay of the B meson,which gives us a good opportunity to explore the mechanism behind it.Very recently,the Collaboration at the Large Hadron Collider at CERN observed new resonance X(4630).Obviously,the X(4630)with 1-+ must be an absolute exotic state different from conventional meson since 1-is not allowed for conventional meson.We may notice an interesting fact,i.e.,the observed X(4630)is just near the Ds*Ds1(2536)threshold,which makes us naturally propose the newly observed X(4630)as a Ds*Ds1(2536)charmoniumlike molecule in the one-boson-exchange mechanism.Especially,the study of its hidden-charmed decays explicitly shows the dominant role of J/?? among all allowed hidden-charmed decays of the X(4630),which enforces the conclusion of X(4630)as a charmoniumlike molecule.The discovery of the X(4630)is a crucial step of constructing charmoniumlike molecule zoo.
Keywords/Search Tags:Molecular state, One-boson-exchange model, Quark-interexchange model, Hidden-charm strong decay
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