the prediction of charged charmoniumlike structures with the hidden-charm and open-strange
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
The prediction of charged charmoniumlike structures with
the hidden-charm and open-strange
刘 翔刘 翔兰州大学兰州大学
2013 年 6 月 27 日中国科学技术大学交叉学科理论研究中心
·
OutlineOutline
• Zc(3900) observed by BESIIIZc(3900) observed by BESIII• The lessons from studying The lessons from studying the hidden-the hidden-
bottom decays of Y(5S)bottom decays of Y(5S)
ISPE mechanismISPE mechanism
• Novel charged structures Novel charged structures existing in the existing in the hidden-charm dikaon decays of hidden-charm dikaon decays of higher higher charmonia charmonia or or charmonium-like statescharmonium-like states
• SummarySummary
Xiang Liu @ LZU 2
Zc(3900) observed by BESIIIZc(3900) observed by BESIII
Xiang Liu @ LZU 3
BESIII, PRL 110, 252001 (2013)
A charged charmonium-like structure
Near the threshold
Zc(3900) confirmed by BelleZc(3900) confirmed by Belle
Xiang Liu @ LZU 4
BESIII, PRL 110, 252002 (2013)
Belle confirmed the BESIII observation of Zc(3900)!
Xiang Liu @ LZU 5
CLEO-c, arXiv: 1304.3036CLEO-c, arXiv: 1304.3036
CLEO-c also released their result of searching for Zc(3900)
Exotic state?Exotic state?
• Abundant observations of charmonium-like states XYZ in the past decade
BaBar, Belle, CLEO, CDF, CMS, LHCbBaBar, Belle, CLEO, CDF, CMS, LHCb• Four different production mechanisms• QCD strong interaction (nonperturbative QCD effectnonperturbative QCD effect)
Charmonium-like states XYZCharmonium-like states XYZ
Zc(3900) makes the spectrum of XYZ become more abundant New process different former four production mechanisms
Xiang Liu @ LZU 7
The lessons from studying The lessons from studying the hidden-bottom decays the hidden-bottom decays
of Y(5S)of Y(5S)
ExperimentExperiment
Xiang Liu @ LZU 8
Belle CollaborationBelle Collaboration
arXiv:1105.4583arXiv:1105.4583
Charged bottomonium-like structuresCharged bottomonium-like structures
Close to the and thresholdClose to the and thresholdXiang Liu @ LZU 9
Dipion hidden-bottom decays of Y(5S)Dipion hidden-bottom decays of Y(5S)
Xiang Liu @ LZU 10
Puzzles of Y(5S) decays
Anomalous production of Y(ns) π+π- with 21.7 fb-1
PRL100, 112001 (2008)
Y(5S)Y(1S) π+π- 0.59±0.04±0.09
Y(5S)Y(2S) π+π- 0.85±0.07±0.16
Y(5S)Y(3S) π+π- 0.52
Y(2S)Y(1S) π+π- 0.0060
Y(3S)Y(1S) π+π- 0.0009
Y(4S)Y(1S) π+π- 0.0019
102
PRD82, 091106R (2011)Γ (MeV)
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, 162001Ali et al., PRL104, 162001
Tetraquark explanation to Y(10870)Tetraquark explanation to Y(10870)
Chen, He, Li, Xiang Liu, Phys.Rev.D84:074006,2011
Indicate the Indicate the mistake in mistake in Ali’s workAli’s work
Propose Propose interference interference
effecteffect
New New puzzle!puzzle!
Zb structues and New PuzzleZb structues and New Puzzle
Xiang Liu @ LZU 12
Chen, Xiang Liu, Zhu, PRD84, 074016 (2011)
Two newly observed Two newly observed ZZbb structuresstructures play play important roleimportant role to to
solve “solve “New puzzleNew puzzle” in ” in Y(5S)Y(5S)Y(2S)Y(2S)ππ++ππ- - decaydecay
Question:Question: what iswhat is the source the source to generateto generate Zb(10610) Zb(10610) andand
Zb(10650)? Zb(10650)?
Exotic states? Exotic states?
Xiang Liu @ LZU 13
Can we find other mechanisms to explain Can we find other mechanisms to explain it?it?Can we find other mechanisms to explain Can we find other mechanisms to explain it?it?
BB* and B*B* molecular statesTetraquark states
Charged bottomonium-like structuresCharged bottomonium-like structures
Close to the D*D and D*D* thresholdClose to the D*D and D*D* threshold
Cusp effect from BB* and B*B* Cusp effect from BB* and B*B* thresholdsthresholds
Bugg, Europhys. Lett.96:11002, 2011
Initial Single Pion Emission (ISPE) Initial Single Pion Emission (ISPE) mechanismmechanism
Xiang Liu @ LZU 14
D.Y. Chen, Xiang Liu, Phys.Rev.D84:094003,2011
First propose a First propose a new decay new decay mechanismmechanism existing in Y(5S) decay existing in Y(5S) decay
the ISPE mechanismthe ISPE mechanismThe emitted pion with The emitted pion with continuous continuous energy distributionenergy distribution
B* and B* with B* and B* with low momentumlow momentum
EasilyEasily interacte with each other interacte with each other
B*B*B*B*Y(nS)Y(nS)ππ
Xiang Liu @ LZU 15
B*B*
BB*
BB
Exp
Kitty head!Kitty head!
Xiang Liu @ LZU 16
BB* BBB*B*
D.Y. Chen, Xiang Liu, Phys.Rev.D84:094003,2011
Xiang Liu @ LZU 17
Chen, Xiang Liu, Zhu, PRD84, 074016 (2011)
A underlying mechanism A underlying mechanism without introducing exotic without introducing exotic
explanation!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
Motivation:Motivation:
If the If the ISPE mechanismISPE mechanism is an is an universaluniversal mechanism in mechanism in heavy quarkonium dipion decays, we naturally heavy quarkonium dipion decays, we naturally extend the ISPE mechanism to study the extend the ISPE mechanism to study the hidden-hidden-charm dipioncharm dipion decays of decays of higher charmoniahigher charmonia
• The similaritysimilarity between charmonium and bottomonium
• Give predictionspredictions for future experiment• An important test to the ISPE mechanism An important test to the ISPE mechanism
• The similaritysimilarity between charmonium and bottomonium
• Give predictionspredictions for future experiment• An important test to the ISPE mechanism An important test to the ISPE mechanism
Novel charged structures Novel charged structures existing in the hidden-charm dipion decays of existing in the hidden-charm dipion decays of
higher charmonia or charmonium-like stateshigher charmonia or charmonium-like states
Xiang Liu @ LZU 19
D.Y. Chen, Xiang Liu, Phys.Rev.D84:094003,2011
Higher charmoniaHigher charmonia
ΨΨ(4040),(4040),ΨΨ(4160),(4160),ΨΨ(4415)(4415)
Charmonium-like stateCharmonium-like state
Y(4260), Y(4360)Y(4260), Y(4360)
ISPE mechanismISPE mechanism
Xiang Liu @ LZU 20
D.Y. Chen, Xiang Liu, Phys.Rev.D84:094003,2011
Predict the charged charmonium-like structures near the and thresholds.
CLEO-c, PRL107, 041803 (2011)
D.Y. Chen, Xiang Liu, Phys. Rev. D84, 034032 (2011)
Xiang Liu @ LZU 21
The Belle Collaboration, Chang-Zheng Yuan’s talk given in “Hadron Structure and interactionin 2011”
Xiang Liu @ LZU 22
D.Y. Chen, Xiang Liu
Phys. Rev. D84, 034032 (2011)
BESIII’s experimental BESIII’s experimental paper paper mentioned mentioned our our
theoretical predictions theoretical predictions of charged charmonim-of charged charmonim-
like structureslike structures
BESIII, PRL 110, 252001 (2013)
Xiang Liu @ LZU 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 andISChE mechanism andthe predicted charged the predicted charged
charmoniumlike structures with the charmoniumlike structures with the hidden-charm and open-strangehidden-charm and open-strange
D.Y. Chen, Xiang Liu and T. MatsukiPhys.Rev.Lett. 110 (2013) 232001
Xiang Liu @ LZU 27
The initial single chiral particle emission The initial single chiral particle emission (ISChE) mechanism(ISChE) mechanism
ISChE mechanism is an important extension of ISPE mechnism
proposed by us
D.Y. Chen, Xiang Liu and T. Matsuki, Phys.Rev.Lett. 110 (2013) 232001
Both the pion and kaon canbe categorized as chiral chiral
particlesparticles.
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:
These processes satisfy
Belle, PRL99, 142002 (2007)
EPL85, 61002 (2009)
We will answer the question of whether there exist charged charmoniumlike structurescharged 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 LagrangiansEffective 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
Our result indicates:
No charged charmonium-like structure with hidden-charm and hidden-strange, which is near the DsD threshold can be found.
The predicted charged charmoniumlike The predicted charged charmoniumlike structures with the hidden-charm and open-structures with the hidden-charm and open-
strangestrange
D.Y. Chen, Xiang Liu and T. Matsuki, Phys.Rev.Lett. 110 (2013) 232001
Xiang Liu @ LZU 33
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.
D.Y. Chen, Xiang Liu and T. Matsuki, Phys.Rev.Lett. 110 (2013) 232001
SummarySummary
• Charmonium-like states XYZ Hot research topic • ISPE mechanism
Predict abundant phenomena of charged charmonium-like structures
• Accessible at Accessible at BESIIIBESIII, Belle, BelleII, SuperB, Belle, BelleII, SuperB
The BESIII’s observation The BESIII’s observation Zc(3900)Zc(3900)
Good opportunity and platform!Good opportunity and platform!
Xiang Liu @ LZU 34
Thank you Thank you for your attention!for your attention!
Xiang Liu @ LZU 35