We present predictions from the string melting version of a multiphase transport model on various observables in Pb+Pb collisions at √ s NN = 5.02 TeV. We use the same version of the model as an earlier study that reasonably reproduced dN/dy, p T spectra and elliptic flow of charged pions and kaons at low-p T for central and semicentral heavy ion collisions at 200 GeV and 2.76 TeV. While we compare with the already-available centrality dependence data on charged particle dN/dη at mid-pseudorapidity in Pb+Pb collisions at 5.02 TeV, we make predictions on identified particle dN/dy, p T spectra, azimuthal anisotropies v n (n = 2,3,4), and factorization ratios r n (η a ,η b )(n = 2,3) for longitudinal correlations.

Charge separation is an important consequence of the Chiral Magnetic Effect. Within the framework of a multi-phase transport model, the effects of final state interactions on initial charge separation are studied. We demonstrate that charge separation can be significantly reduced by the evolution of the Quark-Gluon Plasma produced in relativistic heavy ion collisions. Hadronization and resonance decay can also affect charge separation. Moreover, our results show that the Chiral Magnetic Effect leads to the modification of the relation between the charge azimuthal correlation and the elliptic flow that is expected from transverse momentum conservation only. The transverse momentum and pseudorapidity dependences of, and the effects of background on the charge azimuthal correlation are also discussed.

Medium excitation by jet shower propagation inside a quark-gluon plasma is studied within a linear Boltzmann transport and a multiphase transport model. Contrary to the naive expectation, it is the deflection of both the jet shower and the Mach-cone-like excitation in an expanding medium that is found to gives rise to a double-peak azimuthal particle distribution with respect to the initial jet direction. Such deflection is the strongest for hadron-triggered jets which are often produced close to the surface of dense medium due to trigger-bias and travel against or tangential to the radial flow. Without such trigger bias, the effect of deflection on γ-jet showers and their medium excitation is weaker. Comparative study of hadron and γ-triggered particle correlations can therefore reveal the dynamics of jet-induced medium excitation in high-energy heavy-ion collisions.PACS numbers: 25.75.Bh,25.75.Cj,25.75.Ld Strong jet quenching has been observed in experiments [1][2][3][4] at the Relativistic Heavy-ion Collider (RHIC) as a consequence of jet quenching or parton energy loss in high-energy heavy-ion collisions [5]. The energy and momentum lost by a propagating parton will be carried by radiated gluons and recoiled medium partons which in turn will go through further interaction and eventually lead to collective medium excitation such as supersonic waves or Mach cones [6,7]. Indeed, Mach cones have been found in the solutions of both hydrodynamic response [8][9][10][11][12] and linearized Einstein equations in string theory [13,14] excited by a propagating jet. Such collective excitation by a propagating jet is expected to be responsible for the observed conic back-to-back (b2b) azimuthal dihadron [15,16] and trihadron correlations [17] with a maximum opening angle of ∆φ ≈ 1 (rad) relative to the backside of a triggered high-p T hadron. However, hadron spectra from the freeze-out of the Mach cone in both hydrodynamics with realistic energy-momentum deposition by jets [6,9,10] and string calculations in the hydrodynamic regime [14] fail to reproduce the observed conic azimuthal correlations. Such correlations on the other hand are observed in a multiphase transport (AMPT) Monte Carlo simulations [18] which could come from jetinduced wakes that are deflected by a radially expanding medium [10].Dihadrons with a high-p T trigger are mostly dominated by b2b jets that are produced close to the surface of the dense matter [19] with the awayside jets often traveling against or tangential to the radial flow. Deflection of these jet showers and associated Mach cones by the radial flow can lead to double-peaked hadron azimuthal correlations. On the other hand, high-p T γ's are produced throughout the volume of the dense matter [20]. The effect of deflection should be reduced for γ-triggered jet showers after averaging over all possible production positions and propagation direction, leading to a weaker double-hump γ-hadron correlation as compared to dihadron correlation.In this Letter, we will study medium excitation by a...