1 Dilepton production in heavy ion collision Su Houng Lee Will talk about heavy quark sector Thanks to Dr. Kenji Morita(YITP ), Dr. Taesoo Song(Texas A&M)

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Presentation transcript:

1 Dilepton production in heavy ion collision Su Houng Lee Will talk about heavy quark sector Thanks to Dr. Kenji Morita(YITP ), Dr. Taesoo Song(Texas A&M) Sungtae Cho (Yonsei) and present group members

2 T/Tc  String Tension: QCD order parameter Early work on J/  at finite T (Hashimoto, Miyamura, Hirose, Kanki)

3 J/  suppression in RHIC Matsui and Satz: J/  will dissolve at Tc due to color screening Lattice MEM : Asakawa, Hatsuda, Karsch, Petreczky, Bielefield, Nonaka…. J/  will survive Tc and dissolve at 2 Tc.. Still not settled at QM2011 Potential models (Wong …) :. Refined Potential models with lattice (Mocsy, Petreczky…) : J/  will dissolve slightly above Tc Lattice after zero mode subtraction (WHOT-QCD) : J/  wave function hardly changes at 2.3 Tc AdS/QCD (Kim, Lee, Fukushima, Stephanov…...) NRQCD: UK group+ S.Y. Kim QCD sum rule (Morita, Lee), QCD sum rule+ MEM (Gluber, Oka, Morita) Perturbative approaches: Blaizot et al… Imaginary potential pNRQCD: N. Brambial et al. Recent works on J/  in QGP

4 AdS/QCD (Y.Kim, J.P.Lee, SHLee 07) J ’’ Deconfinement Thermal effect? Mass(GeV)

5 Lattice result on singlet potential F(T,r) =V(T,r) -TS(T,r) J/  from potential models Kaczmarek, Zantow hep-lat/ V(T,r) at 1.3 Tc F(T,r) at 1.3 Tc V(r) at T=0 Quarkonium dissociation temperature for different potentials Using F(T,r) Using V(T,r) Wong 04 Another model independent approach ? r [fm]

6 Tc region is important in HIC Large non-perturbative change at Tc Resumed perturbation fails Karsch hep-lat/ T (GeV) Au+Au 200 Agev, b=0 (fm/c) (e-3p)/T 4 T/T c Few things to note about Tc region

7 Gluon field configurations near Tc K.Morita, SHL: PRL 100, (08) K.Morita, SHL: PRC 77, (08) SHL, K. Morita: PRD 79, (09) Y.Song, SHL, K.Morita: PRC 79, (09) A non perturbative method for quarkonium near Tc

8 Lattice result for purge gauge (Boyd et al 96) p/T 4 /T 4 Rescaled pressure (Karsch 01) Karsch hep-lat/ Sudden increase in  Slow increase in p Lattice data on ( e,p) near Tc

9 Summary GeV /  J M   m from QCD Stark Effect Mass and width of J/  near Tc (Morita, Lee 08, M, L & Song 09)  QCD sum rule limit with  =0  =constraint-m (Stark effect) Constraints from Borel sum rule NLO QCD + confine-model

10 Summary Summary of analysis Due to the sudden change of condensate near Tc T G0G0 G2G2 Abrupt changes for mass and width near Tc

11 Karsch et al. 0.75T c 0.9 T c K.Morita, Y. Song, SHL 1.1T c 400 MeV 1.1T c 1 GeV 0.9T c T c 1.5T c 400 MeV 1.5T c 400 MeV Karsch et al. K.Morita, Y. Song, SHL Comparison to other approach T=0 1.1T c Mocsy, Petreczky  c state from lattice  b state from lattice

12 Gubler, Morita, Oka (2011) QCD OPE + MEM

13 R AA and v 2 of Charmonium T. Song, W. Park, SHL : Phys. Rev. C 81, (2010) T. Song, C. M. Ko, SHL, Jun Xu : Phys. Rev. C 83, (2011) T. Song, C. M. Ko, K. Han, SHL: in preparation

14 Melting of  ’  c Slope:  J/  Melting T of J/  Height: mass of J/  RAA from RHIC (√s=200 GeV y=0, 2-comp model (Rapp) Song, Park, Lee 10)

15 Effects of width and mass At LHC Mass shift by -100 MeV Assumed recombination effect to be the same

16 V2 T. Song et al. Hydro + cc conservation Thermal + flow

17 From QM 2011 No analysis yet !!

18

19

20

21 Cornell Potential

22 No regeneration  too much suppression?  mass shift

23

24 1.Deconfinement  Potential  Quarkonium masses 2.Abrupt changes for quarkonium masses 3.Looking forward to Raa, v2 charmonium bottomonium ratio and finer mass resultion from RHIC and LHC 4.production inside a nuclear at FAIR and Summary

25 심광숙  선생님  더욱  건강하시고  계속  뵙기를  바랍니다 

26 1.Finite temperature lattice: Karsch: arXiv: , , , Kaczmarek et al. PRD 70, Sum rule method at finite T: J/psi formal: Hashimoto et al. PRL 57,2123 (1986), Matsui and Satz, PLB 178, 416 (1986), Asakawa, Hatsuda PRL 92, (2004), Morita, Lee, PRL 100,022301, Mocsy, Petreczky, PRL, 99, (2007) 4.J/Psi Phenomenology: Gazszicki, Gorenstein, PRL 83, 4009 (1999), PBM, J. Stachel, PLB490, 196 (2000), Andronic et al. arXiv::nucl- th/ , Grandchamp and Rapp, NPA 709, 415 (2002), Yan, Zhuang, Xu, PRL,97, (2006), Song, Park, Lee arXiv: J/psi in medium, Brodsky et al. PRL 64,1011 (1990), Lee, nucl- th/ , References