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Energy Loss and Flow of Heavy Quarks in Au+Au Collisions at sNN\sqrt{s_{NN}} = 200 GeV

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422 authors, 58 institutions, 6 pages text, 3 figures, REVTeX4. Submitted to Physical Review Letters. Version v2 has a replacement for Fig. 3 to fix an error in picking up a wrong theory curve. No change to text or data. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html - EI

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... 7 See Refs. [12,13] for recent estimates. ...
... The proposals have been quickly extended to the other gauge theories [65]- [73]. 13 To discuss jet quenching, one now moves the fundamental string with a velocity v along a brane direction. Then, the momentum carried by the string flows towards the horizon and one interprets the flow as the energy loss rate. ...
... The large-λ limit of the AdS/CFT is g YM → 0 and N → ∞. But of course QGP has a large-λ since 13 See Refs. [74]- [80] for the other issues. ...
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We review the AdS/CFT description of gauge theory plasmas for non-experts. We discuss the low shear viscosity, jet quenching, and J/psi-suppression, which are three major signatures for the quark-gluon plasma observed at RHIC experiments.
... The values of the parameters required for spacetime evolution are displayed in Table 3. With all these ingredients we evaluate the correlation function 2 for 0-5% Au+Au collisions centrality for RHIC at √ = 200 GeV [132] and Pb+Pb collisions at for LHC at √ = 2.76 TeV [133] for different invariant mass windows as a function of side and out which are related to transverse momenta of individual pair [134,135]. By choosing appropriate phase space for the QGP and hadron gas and performing the space time integration using the initial condition tabulated in Table 3, the 2 for different phase has been evaluated. ...
... Now we study the sensitivity of the HBT radii on the different collision energy. The side and out extracted from the 2 's evaluated for 0-5% centrality in Au+Au collisions for RHIC at √ = 200 GeV [132] and Pb+Pb collisions for LHC at √ = 2.76 TeV [133] for different invariant mass windows as a function of side and out are shown in Figure 32. The change of side with ⟨ ⟩ for RHIC and LHC is qualitatively similar but quantitatively different. ...
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In this review, we have discussed the different sources of photons and dileptons produced in heavy ion collision (HIC). The transverse momentum () spectra of photons for different collision energies are analyzed with a view of extracting the thermal properties of the system formed in HIC. We showed the effect of viscosity on spectra of produced thermal photons. The dilepton productions from hot hadrons are considered including the spectral change of light vector mesons in the thermal bath. We have analyzed the and invariant mass () spectra of dileptons for different collision energies too. As the individual spectra are constrained by certain unambiguous hydrodynamical inputs, so we evaluated the ratio of photon to dilepton spectra, , to overcome those quantities. We argue that the variation of the radial velocity extracted from with is indicative of a phase transition from the initially produced partons to hadrons. In the calculations of interferometry involving dilepton pairs, it is argued that the nonmonotonic variation of HBT radii with invariant mass of the lepton pairs signals the formation of quark gluon plasma in HIC. Elliptic flow () of dilepton is also studied at TeV for 30–40% centrality using the hydrodynamical model.
... At both RHIC and the LHC, a suppression of the yield of D mesons and high-p T electrons and muons from heavy-flavour hadron decays was observed in AA collisions. The suppression is nearly as large as that of light-flavour hadrons at high p T [33][34][35][36][37]. The D meson and pion R PbPb were found to be consistent within uncertainties and described by model calculations that include a colour-charge dependent energy loss [35,38,39]. ...
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... (It is now possible to detect directly mesons at LHC detectors like ALICE, see [16]). Hence, no wonder that in the recent past a large number of attempts have been made to study both heavy flavour suppression [13,14] and elliptic flow [17] within the framework of perturbative QCD (pQCD) [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. ...
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