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Viscous Hydrodynamic Evolution for the CGC at RHIC and LHC. Akihiko Monnai Department of Physics, The University of Tokyo Collaborator: Tetsufumi Hirano. The 17 th Heavy Ion Caf é March 3 rd 2011, The University of Tokyo. Multiplicity at LHC. K. Aamodt et al. PRL105 252301.
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Viscous Hydrodynamic Evolution for the CGC at RHIC and LHC Akihiko Monnai Department of Physics, The University of Tokyo Collaborator: Tetsufumi Hirano • The 17th Heavy Ion Café • March 3rd2011, The University of Tokyo
Multiplicity at LHC K. Aamodtet al. PRL105252301 Pb+Pb, 2.76 TeV at η = 0 • CGC predictions vs. LHC data CGC Color glass condensate (CGC): Description of saturated gluons in nuclei before a collision ALICE data (most central 0-5%) Is the CGC not applicable at LHC? The 17th Heavy Ion Café – Open Discussion Akihiko Monnai
Multiplicity at LHC H. J. Drescher and Y. Nara, PRC 75, 034905 PRC 76, 041903 Saturation scale in MC-KLN model • CGC parameters • CGC for heavy ion collisions λ=0.38 λ=0.28 λ=0.18 Fixed via direct comparison with data dN/dy (RHIC data compatible with λ~0.28) Observed particle distribution Initial condition From the CGC Initial condition From the CGC Hydrodynamic evolution Observed particle distribution a missing piece! Is the hydrodynamic effect important ? The 17th Heavy Ion Café – Open Discussion Akihiko Monnai
Multiplicity at LHC • AM and T. Hirano, • arXiv:1102.5053 [nucl-th] LHC RHIC • Effects of (1+1)D Viscous Hydro Outward entropy flux Flattening Entropy production Enhancement If the true λ is larger at RHIC, it enhances dN/dy for LHC; A possible candidate for explaining the “gap” at LHC? The 17th Heavy Ion Café – Open Discussion Akihiko Monnai
