Su Houng Lee – (ExHIC coll.) 1. Few words on recent observations of Multiqaurk states 2. Particle production in Heavy Ion Collision 3. Exotica from Heavy Ion Collision 4. Suggestions + Summary Exotics from a constituent quark model and it implications to ExHIC 1

2 I: Few words on “Multiquark states” X(3872), Zc(3900), X(5568)… Zb(10610), Zb(10650) + LHCb J/ p PRL 115, (2015)

X(3872)

Spin parity = 1+ Z(4430) G=+  will look at C=-

BESIII (Belle) Z(3900) Probably the same Quantum Number as Z(4430) Hence,

6 - arXiv: D0 coll X(5568) Possibly diquark-antidiquark 0+ Hence,

Pentaquark - Pc

8 c c q q Quark wave function for Tetraquark - wave and spin 1 - W. Park (Thesis) - Color Spin Color singlet Spin 1 quark antiquark

9 c c q q Quark wave function for s-wave S=1 Tetraquark (Park,SHL14) C=+ C=- Color Spin

10 Hamiltonian Using Brink, Stancu 98  Ground state of C=+ (Woosung Park, SHL 14) Or

11  State with C=- (Woosung Park, SHL 14)  Or are molecular states: Ground state  Or Z(4430), X(3872) can be mixture of tetraquark and molecule Navara, Nielsen, Lee, Phys. Rept (11)  Or is 2s of in diquark picture (Maiani, Polosa, Riquer)

12 - WASA-at-COSY- d*(2380) ud  uu d d u u u d d d d*  ColorSpinFavor V (QQ) 1 3bar0 -2 (QQ) 2 162/3 (QQ) (QQ) 4 13bar-1/3  W.Park, A. Park, SHL, (PRD 15)

13 Quark wave function for light dibaryons (W.Park, A.Park, SHL15) - Choose the spatial part to be symmetric - Choose the Color-Isospin-Spin part to be antisymmetric : SU(12) Physical State

Independent color singlet state

15 1) Numerical result for Mass and E B =-binding

16 What are they ??? 1) X(3872), Z(3900), d*(2380), H: can not be compact states 2) Tcc(s=1), Tcb(s=0), Tsb(s=0)could be compact 3) Where are the flavor exotic states Constituent quark model calculations

17 What are they ??? 1) Molecular states: (Tornqvist, Rosner..)  Long range bound state 2) Multiquark states : confining color interaction  compact configuration 3) Where are the flavor exotic states cu u c What are these states ?? Not clear

18 II: Particle production in Heavy Ion Collision

19  1 fm/c 5 fm/c 7 fm/c 17 fm/c QGP Hadron phase TFTF Particle production and freezeout in Heavy Ion Collision T TCTC THTH Hadron Multiquark formation Resonance Molecular structure formation

20 ALICE – Statistical model Production of hadrons near Tc RHIC/STAR antimatter S/N is conserved (Siemens, Kapusta 79)

21 Production of light nuclei ?? - Statistical model at near Tc  Hadronic matter effect  C.M. Ko  1 fm/c 5 fm/c 7 fm/c 17 fm/c QGP Hadron phase TFTF T TCTC THTH Volume/Nucleon Deuteron volume

22 ALICE (2015 prc) Production of resonances : at T < Tc  Reconstruction S. Cho, T. Song, SHL arXiv:

23  7 fm/c 17 fm/c Hadron phase TFTF Freeze out condition for a particle THTH T  Two time scale (=cosmology)  Freeze out density  Freeze out condition

Normal meson Compact multiquark MoleculesResonance Geometrical configuration Yields /Statistical model 1< 0.1 ~ 1~ uu u d u d u u u d Normal meson, compact multiquark, molecutes, resonances u d

25 d u d u u s d s d d d u d u u s d s u u u d u s Tetraquark configuration [overlap]<<1 Molecular configuration: [overlap]=1 d Normal meson [overlap]=1 d d u Hadron production through coalescence u d uu u d u u u d u d d u d Coalescence model at Tc  ratio of yield

26 RHIC – Statistical model (PBM..) RHIC/STAR antimatter S/N is conserved (Siemens, Kapusta 79)

27 III: Exotics from Heavy Ion Collision

28  large number of c, b quark production  Vertex detector: weakly decaying exotics : FAIR 10 4 D 0 /month, LHC 10 5 D 0 /month New perspective of Hadron Physics from Heavy Ion Collision T cc /D > 0.34 x RHIC > 0.8 x LHC  T cc production

29  Model central rapidity, central collision  Introduce charm fugacity LHC 10 5 D 0 /month Details of coalescence model calculation (ExHIC PRL, PRC 2011)  Coalescence model model and Wigner function  Parameters to fit normal hadron production including resonance feedown from statistical model

30  Hadron coalescence

31 Expectations [overlap] at LHC Fachini [STAR]

32 Suggestions 1. Lambda (1405): two poles? 2. Dibayrons: H, N-Omega, Hc(uuudsc), d*(2323)  Delta+Delta 3. Light molecules or tetraquarks 4. Heavy Tetraquarks 5. Heavy Pentaquarks

33 Summary Whats the difference between compact multiquark states and molecular states  Need heavy quarks to enhance diquark correlation  Multiquarks will tell us about 3,4-body QCD force Measurements from Heavy Ion can discriminate the structures Normal meson Compact multiquark MoleculesResonance Yields /Statistical model 1< 0.1 1~ 2~ 0.5 Flavor exotics will involves two heavy quarks  Heavy ion can easily produce