1 / 33

Hadron Physics at RHIC

Hadron Physics at RHIC. Su Houng Lee 1. Few words on hadronic molecule candidates and QCD sum rules 2 . Few words on diquarks and heavy Multiquark States 3. Exotics from Belle- Heavy Ion . Recent Highlights in Hadron Physics – Heavy quark sector. Babar: D SJ (2317) 0 +

alder
Download Presentation

Hadron Physics at RHIC

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hadron Physics at RHIC Su Houng Lee 1. Few words on hadronic molecule candidates and QCD sum rules 2. Few words on diquarks and heavy Multiquark States 3. Exotics from Belle- Heavy Ion

  2. Recent Highlights in Hadron Physics – Heavy quark sector Babar: DSJ(2317) 0+ Puzzle in Constituent Quark Model(2400) • D0 K+ (2358) threshold effect • Chiral partner of (0-1-) • Tetraquark molecule ? X(3872) G<10 MeV, Y(4260), Z(4430) G<50  y’p Z(4051),Z(4248) cc1p Must contain cc ?

  3. 1-- States from ISR

  4. Newly observed states M. Nielsen, F. Navarra, SHL: arXiv:0911.1958: Review paper

  5. QCD sum rule results • sum rule : Large M2 : Small M2 Such Good Borel curve exists when pole Dom.  Resonance or pole exists OPE Conv. 2. Large overlap f M2 • In principle QCD can not distinguish between diquark configuration and molecular configuration • but if the overlap is large, plateau and OPE convergence, pole dominance •  can learn which current has large overlap

  6. QCD sum rules X(3872): SHL, K. Morita, M. Nielsen (PRD08) • J=[s][V] Tetraquark current vs. J=DD* Molecular current Small width <2 MeV

  7. Previous Work on Multiquark hadrons - Light quark sector Scalar tetraquark (Jaffe 76) L(1405) (Jido, Sekihara..) N S K p + Search for Q+ pentaquark Search for H dibaryon

  8. What are the systematics? What are these particles? Where else should we look for?

  9. Some insights from for Multiquark configurations in a schematic quark model (with S. Yasui )

  10. Color spin interaction (De Rujula, Georgi, Glashow..) • color spin interaction: • Diquark configurations vs. quark-antiquarkconfigurations q2 q4 q1 q2

  11. Diquarkcorrelation inside Baryons Example u d d u s s

  12. Works very well with 3x CB = CM =635 mu2 d u u d x 3= quark-antiquarkin Meson p r d u d u

  13. Q+ (Jaffe Wilczek conf) in a naïve quark model L=1 Q+ P K u d u d  s u d d 1/2+ u s L2 contribution • - 500 MeV in Five body quark model by Hiyama, Hosaka et al (06)

  14. 2SC Phase CFL Phase of color superconductivity ? Di-bayron (Conf 1) – (qq) (qq) (qq) H di-baryon u d u d u d u s  0+ s s d s H di-baryon could be bound • unfortunately not found in so far

  15. Multiquark configuration: • Diquark attracation vs quark-antiquark q1 q3 q2 • diquark picture: Yasui, Ko, Liu, Lee,.. (EJP08,EJP09)

  16. Diquark picture for L (with D. Jido , K. Kim) • Magnetic moment: L = (ud)0 s d u s • QCD sum rule with diquark field f d s u OPE

  17. Result:

  18. Result- cont • Constituent diquark mass

  19. Recently observed states with hidden charm states • Most probably molecular state NOT tetraquark q1 q3 c c q1 c q1 q3 q1 q3 c q3 c c c c p p p D* D* D D1 X(3872) Z(4430)

  20. Where are the tetraquarks and multiquark configurations? Dense matter?

  21. Tetra-quark - configurations Binding against decay = (Mass of 2 Mesons) – (Mass of Tetraquark) 0+  0- 0- d u d d u u u d 0+  0- 0- c u d c b u b d

  22. Tetra-quark – hadronic weak decay modes  0- 1- 1+ c u d c c u c d - Binding against decay = - 79.3 MeV

  23. c c Previous works on Tcc Z. Zouzou, B. Silverstre-Brac, C. Gilgnooux, J Richard (86), D. Janc, M. Rosina (04), Y. Cui, S. L. Zhu (07) QCD sum rules: F Navarra, M. Nielsen, SHLee, PLB 649, 166 (2007) simple diquark: SHL, S. Yasui, W.Liu, C Ko EPJ C54, 259 (2008), SHL, S. Yasui: EPJ C (09) Belle: PRL 98, 082001 (07) e+ e-  J/y + X(3904)  DD* Canlook for 1+ (Tcc) e Tcc(3800) X(3904) c c e+ SHL, S Yasui, W Liu, C Ko (08)

  24. Di-bayron – general considerations H di-baryon H di-baryon u d u s 1 2 0+ 3 4 1 2 3 4 0+ d s 5 6 5 6  B B Conf-1

  25. Di-bayron – general considerations di-baryon B B 1 2 3 4 Conf-2 1 2 3 4  0+ 5 6 5 6

  26. Di-baryon (Conf 2) – (qq) (qq) (qQ) Hc di-baryon P Xc 0+ s u d u  u d u s u c u c Hcdi-baryon

  27. New perspective of Hadron Physics from Heavy Ion Collision • large number of c , b quark production • Larger source size: A. Ohnishi .. • Vertex detector: weakly decaying exotics : FAIR 104 D0 /month

  28. Exotics Factory J/ψ, χC u u d d s s RHIC,LHC c ΛC /D c d T u Quark-gluon plasma J/ψ p Tcc u p d Exotics Factory u u d u Nuclear matter Color superconductivity m

  29. ExHIC (collaboration) • Started from Molecular workshop • 12 people 9 institutions

  30. First project: Production rate 1. Mol=usual hadron > Exotic 2. Realistic measurement of exotics are possible

  31. Production ratios for predicted Multiquarks • Qc production at RHIC and LHC Qc/D > 0.74 x 10 -4 Qc/Ds> 0.23 x 10 -3 • Hc production at RHIC and LHC Hc/D > 0.8 x 10 -4 Hc/Ds> 0.25 x 10 -3 • Tcc production Tcc/D > 0.34 x 10 -4 RHIC > 0.8 x 10 -4 LHC

  32. More ExHIC Physics • General considerations for molecular states • Production rates at Belle : ExoticsfromHIgh energy e+e- Collision • Pt dependence of Lc/D ratio ……

  33. Summary of talk • We are witnessing an exciting time in hadron physics : •  Categorizing excited states and understanding exotics •  Systematics ?? • Diquarks are unique features of QCD, Mutltiquark states will exits in Heavy sector, due to diquark structure Tcc (ud cc) Qbs (udusb), Hc(udusuc)  real weak decay, small background in RHIC, LHC  can be a very useful heavy exotic factory  If found, it will be the first flavor exotic ever,  will tell us about QCD, q-q interaction and dense matter  great step forward in QCD 3. Belle + Heavy Ion can provide new perspectives in the search

More Related