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The prediction of charged charmoniumlike structures with the hidden-charm and open-strange

The prediction of charged charmoniumlike structures with the hidden-charm and open-strange. ·. 刘 翔 兰州大学. 2013 年 6 月 27 日中国科学技术大学交叉学科理论研究中心. Outline. Zc(3900) observed by BESIII The lessons from studying the hidden-bottom decays of Y(5S)  ISPE mechanism

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The prediction of charged charmoniumlike structures with the hidden-charm and open-strange

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  1. The prediction of charged charmoniumlike structures with the hidden-charm and open-strange · 刘 翔 兰州大学 2013年6月27日中国科学技术大学交叉学科理论研究中心

  2. Outline • Zc(3900) observed by BESIII • The lessons from studying the hidden-bottom decays of Y(5S) ISPE mechanism • Novel charged structures existing in the hidden-charm dikaon decays of higher charmoniaor charmonium-like states • Summary Xiang Liu @ LZU

  3. Zc(3900) observed by BESIII BESIII, PRL 110, 252001 (2013) • A charged charmonium-like structure • Near the threshold Xiang Liu @ LZU

  4. Zc(3900) confirmed by Belle BESIII, PRL 110, 252002 (2013) Belleconfirmed the BESIII observation of Zc(3900)! Xiang Liu @ LZU

  5. CLEO-c, arXiv: 1304.3036 CLEO-c also released their result of searching for Zc(3900) Exotic state? Xiang Liu @ LZU

  6. Charmonium-like states XYZ • Abundant observations of charmonium-like states XYZ in the past decade • BaBar, Belle, CLEO, CDF, CMS, LHCb • Four different production mechanisms • QCD strong interaction (nonperturbative QCD effect) • Zc(3900) makes the spectrum of XYZ become more abundant • New process different former four production mechanisms

  7. The lessons from studying the hidden-bottom decays of Y(5S) Xiang Liu @ LZU

  8. Experiment Belle Collaboration arXiv:1105.4583 Xiang Liu @ LZU

  9. Charged bottomonium-like structures • Close to the and threshold Xiang Liu @ LZU

  10. Dipion hidden-bottom decays of Y(5S) Puzzles of Y(5S) decays Anomalous production of Y(ns) π+π- with 21.7 fb-1 PRD82, 091106R (2011) PRL100, 112001 (2008) Γ (MeV) 102 • Rescattering mechnism • Meng, Chao, PRD77, 074003 (2008) • Tetraquakr state Yb near Y(5S) • Ali et. al., PLB684, 28-39 (2010) Xiang Liu @ LZU

  11. Ali et al., PRL104, 162001 Chen, He, Li, Xiang Liu, Phys.Rev.D84:074006,2011 Tetraquark explanation to Y(10870) Indicate the mistake in Ali’s work Propose interference effect New puzzle! Xiang Liu @ LZU

  12. Chen, Xiang Liu, Zhu, PRD84, 074016 (2011) Zb structues and New Puzzle Two newly observed Zb structures play important role to solve “New puzzle” in Y(5S)Y(2S)π+π- decay Question:what is the source to generate Zb(10610) and Zb(10650)? Xiang Liu @ LZU

  13. Exotic states? • Charged bottomonium-like structures • Close to the D*D and D*D* threshold Cusp effect from BB* and B*B* thresholds Bugg, Europhys. Lett.96:11002, 2011 BB* and B*B* molecular states Tetraquark states Can we find other mechanisms to explain it? Xiang Liu @ LZU

  14. First propose a new decay mechanism existing in Y(5S) decay the ISPE mechanism The emitted pion with continuous energy distribution B* and B* with low momentum Easily interacte with each other B*B*Y(nS)π Initial Single Pion Emission (ISPE) mechanism D.Y. Chen, Xiang Liu, Phys.Rev.D84:094003,2011 Xiang Liu @ LZU

  15. Kitty head! BB* Exp BB B*B* Xiang Liu @ LZU

  16. BB* B*B* BB D.Y. Chen, Xiang Liu, Phys.Rev.D84:094003,2011 Xiang Liu @ LZU

  17. Chen, Xiang Liu, Zhu, PRD84, 074016 (2011) A underlying mechanism without introducing exotic explanation! • Explain why the charged structures near BB* and B*B* thresholds can be found in the hidden-charm dipion decays of Y(5S) • We cannot find the sharp peak close to the BB threshold Xiang Liu @ LZU

  18. Novel charged structures existing in the hidden-charm dipion decays of higher charmonia or charmonium-like states Motivation: If the ISPE mechanism is an universal mechanism in heavy quarkoniumdipion decays, we naturally extend the ISPE mechanism to study the hidden-charm dipion decays of higher charmonia • The similarity between charmonium and bottomonium • Give predictions for future experiment • An important test to the ISPE mechanism Xiang Liu @ LZU

  19. D.Y. Chen,Xiang Liu, Phys.Rev.D84:094003,2011 ISPE mechanism • Higher charmonia • Ψ(4040),Ψ(4160),Ψ(4415) • Charmonium-like state • Y(4260), Y(4360) Xiang Liu @ LZU

  20. Predict the charged charmonium-like structures near the and thresholds. D.Y. Chen, Xiang Liu, Phys.Rev.D84:094003,2011 Xiang Liu @ LZU

  21. D.Y. Chen, Xiang Liu, Phys. Rev. D84, 034032 (2011) CLEO-c, PRL107, 041803 (2011) Xiang Liu @ LZU

  22. The Belle Collaboration, Chang-Zheng Yuan’s talk given in “Hadron Structure and interactionin 2011” Xiang Liu @ LZU

  23. BESIII, PRL 110, 252001 (2013) BESIII’s experimental paper mentioned our theoretical predictions of charged charmonim-like structures D.Y. Chen, Xiang Liu Phys. Rev. D84, 034032 (2011)

  24. D.Y. Chen,Xiang Liu, T. Matsuki, arXiv:1304.5845 Reproduce Zc(3900) via the ISPE mechanism Xiang Liu @ LZU

  25. D.Y. Chen, Xiang Liu, T. Matsuki, arXiv:1306.2080 The similarity between Y(4360) and Y(4260) Novel charged charmoniumlike structures in the hidden-charm dipion decays of Y(4360) Xiang Liu @ LZU

  26. ISChE mechanism andthe predicted charged charmoniumlike structures with the hidden-charm and open-strange D.Y. Chen, Xiang Liu and T. Matsuki Phys.Rev.Lett. 110 (2013) 232001 Xiang Liu @ LZU

  27. The initial single chiral particle emission (ISChE) mechanism D.Y. Chen, Xiang Liu and T. Matsuki, Phys.Rev.Lett. 110 (2013) 232001 ISChE mechanism is an important extension of ISPE mechnism proposed by us Both the pion and kaon can be categorized as chiral particles. • The hidden-charm dikaon decays of a higher charmonium are intriguing processes • The initial single chiral particle emission (ISChE) mechanism can play an important role in these decays Xiang Liu @ LZU

  28. Via ISChE mechanism, we study these processes: Belle, PRL99, 142002 (2007) These processes satisfy EPL85, 61002 (2009) We will answer the question of whether there exist charged charmoniumlike structures with both of hidden-charm and open-strange channels. Xiang Liu @ LZU

  29. Effective Lagrangian approach is adopted to write out the decay amplitude Effective Lagrangians the heavy quark limit + chiral symmetry Xiang Liu @ LZU

  30. Decay amplitude: Monoploe form factor Xiang Liu @ LZU

  31. A general expression of the differential decay width Xiang Liu @ LZU

  32. The predicted charged charmoniumlike structures with the hidden-charm and open-strange D.Y. Chen, Xiang Liu and T. Matsuki, Phys.Rev.Lett. 110 (2013) 232001 Our result indicates: No charged charmonium-like structure with hidden-charm and hidden-strange, which is near the DsD threshold can be found. Xiang Liu @ LZU

  33. D.Y. Chen, Xiang Liu and T. Matsuki, Phys.Rev.Lett. 110 (2013) 232001 • There exist enhancement structures with both hidden-charm and open-strange. • These predicted charged charmonium-like structures can be accessible at future experiment, especially BESIII, BelleII and SuperB. Xiang Liu @ LZU

  34. Summary • Charmonium-like states XYZ Hot research topic • ISPE mechanism Predict abundant phenomena of charged charmonium-like structures • Accessible at BESIII, Belle, BelleII, SuperB The BESIII’s observation Zc(3900) Good opportunity and platform! Xiang Liu @ LZU

  35. Thank you for your attention! Xiang Liu @ LZU

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