Björn Schenke

Dijet asymmetry at the energies available at the CERN Large Hadron Collider

The martini numerical simulation allows for direct comparison of theoretical model calculations and the latest results for dijet asymmetry from the ATLAS and CMS collaborations. In this paper, partons are simulated as undergoing radiative and collisional processes throughout the evolution of central lead-lead collisions at the Large Hadron Collider. Using hydrodynamical background evolution determined by a simulation which fits well with the data on charged particle multiplicities from ALICE and a value of αs ≈ 0.25 − 0.3, the dijet asymmetry is found to be consistent with partonic energy loss in a hot, strongly-interacting medium. ∗Electronic address: clinty@physics.mcgill.ca †Electronic address: bschenke@quark.phy.bnl.gov ‡Electronic address: jeon@physics.mcgill.ca §Electronic address: gale@physics.mcgill.ca 1 ar X iv :1 10 3. 57 69 v2 [ nu cl -t h] 2 J un 2 01 1

Dynamical initial state model for relativistic heavy-ion collisions

We present a fully three-dimensional model providing initial conditions for energy and net-baryon density distributions in heavy ion collisions at arbitrary collision energy. The model includes the dynamical deceleration of participating nucleons or valence quarks, depending on the implementation. The duration of the deceleration continues until the string spanned between colliding participants is assumed to thermalize, which is either after a fixed proper time, or a fluctuating time depending on sampled final rapidities. Energy is deposited in space-time along the string, which in general will span a range of space-time rapidities and proper times. We study various observables obtained directly from the initial state model, including net-baryon rapidity distributions, 2-particle rapidity correlations, as well as the rapidity decorrelation of the transverse geometry. Their dependence on the model implementation and parameter values is investigated. We also present the implementation of the model with 3+1 dimensional hydrodynamics, which involves the addition of source terms that deposit energy and net-baryon densities produced by the initial state model at proper times greater than the initial time for the hydrodynamic simulation.

Elliptic and triangular flows in 3+1D viscous hydrodynamics with fluctuating initial conditions

Using a 3+1D viscous hydrodynamic model of relativistic heavy ion collisions, we show that event-by-event fluctuation is essential in understanding the quark–gluon plasma produced in collisions at the RHIC and the LHC.

Effects of bulk viscosity and hadronic rescattering in heavy ion collisions at energies available at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider

Sangwook Ryu, 2 Jean-François Paquet, 1 Chun Shen, Gabriel Denicol, Björn Schenke, Sangyong Jeon, and Charles Gale Department of Physics, McGill University, 3600 rue University, Montreal, Quebec H3A 2T8, Canada Frankfurt Institute for Advanced Studies, Ruth-Moufang 1, 60438 Frankfurt, Germany Department of Physics & Astronomy, Stony Brook University, Stony Brook, NY 11794, USA Instituto de F́ısica, Universidade Federal Fluminense, UFF, Niterói, 24210-346, RJ, Brazil Physics Department, Brookhaven National Laboratory, Upton, NY 11973, USA (Dated: May 31, 2017)

Proton structure fluctuations: from HERA to the LHC

We constrain the amount of event-by-event fluctuations of the proton by comparing with the HERA coherent and incoherent diffractive

Monte-Carlo Simulation of Hard Probes in Heavy-Ion Collisions

J/Psi

Monte-Carlo simulation of heavy-ion collisions

production data. We find that the HERA measurements prefer large geometric fluctuations. We then include the constrained fluctuating proton shapes in viscous hydrodynamical simulations of the proton-nucleus collisions at

Initial-state geometry and fluctuations in Au + Au, Cu + Au, and U + U collisions at energies available at the BNL Relativistic Heavy Ion Collider

sqrt{s_{NN}}=5.02

Effect of initial-state nucleon-nucleon correlations on collective flow in ultra-central heavy-ion collisions

TeV, and find a good description of the mean transverse momentum and flow harmonics measured at the LHC.

Effects of bulk viscosity and hadronic rescattering in heavy ion collisions at RHIC and LHC

Results from the Modular Algorithm for Relativistic Treatment of heavy IoN Interactions (MARTINI) are presented. This comprehensive event generator for the hard and penetrating probes in high energy nucleus-nucleus collisions employs a time evolution model for the soft background, PYTHIA 8.1 and the McGill-AMY parton evolution scheme including radiative as well as elastic processes. It generates full event configurations in the high pT region, taking into account thermal QCD and QED effects as well as effects of the evolving medium.