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In nuclear collisions at highest accessible LHC energies, often more than one dijet pairs deposit momentum into the deconfined expanding medium. With the help of 3+1 dimensional relativistic hydrodynamic simulation we show that this leads…

Nuclear Theory · Physics 2015-07-03 Martin Schulc , Boris Tomasik

In nuclear collisions at the LHC large number of hard partons are created in initial partonic interactions, so that it is reasonable to suppose that they do not thermalise immediately but deposit their energy and momentum later into the…

Nuclear Theory · Physics 2015-07-03 Boris Tomasik , Martin Schulc

Minijets and jets are produced in large numbers in nuclear collisions at TeV energies, so that there are many of them in a single fireball. They deposit non-negligible amount of momentum and energy into the hydrodynamically expanding bulk…

Nuclear Theory · Physics 2017-04-05 Boris Tomasik , Martin Schulc

I study a possible effect of momentum deposition from many hard partons traversing the hot and dense region produced early in nuclear collisions at the LHC. The expected number of such hard partons is large. It is argued that the induced…

Nuclear Theory · Physics 2010-02-09 Boris Tomasik

We argue that energy and momentum deposition from hard partons into quark-gluon plasma induces an important contribution to the final state hadron anisotropies. We also advocate a novel method of Event Shape Sorting which allow to analyse…

Nuclear Theory · Physics 2019-05-01 Boris Tomasik , Jakub Cimerman , Renata Kopecna , Martin Schulc

The rapid expansion of the fireball created in a heavy-ion collision causes strong departures from local equilibrium. Such effects are especially important in the very early phase of the collision, bringing a substantial pressure asymmetry.…

Nuclear Theory · Physics 2023-12-25 Piotr Bozek

The effects of angular momentum conservation in peripheral heavy ion collisions at very high energy are investigated. It is shown that the initial angular momentum of the quark-gluon plasma should enhance the azimuthal anisotropy of…

Nuclear Theory · Physics 2008-11-26 F. Becattini , F. Piccinini , J. Rizzo

Heavy-ion collisions create deformed quark-gluon plasma (QGP) fireballs which explode anisotropically. The viscosity of the fireball matter determines its ability to convert the initial spatial deformation into momentum anisotropies that…

Nuclear Theory · Physics 2015-03-19 Zhi Qiu , Ulrich W. Heinz

Within hydrodynamics we study the effects of the initial spatial anisotropy in non-central heavy-ion collisions on the momentum distributions of the emitted hadrons. We show that the elliptic flow measured at midrapidity in 158 A GeV/c…

Nuclear Theory · Physics 2009-10-09 Peter F. Kolb , Josef Sollfrank , Ulrich Heinz

We develop a systematic framework for the study of the initial collision geometry fluctuations in relativistic heavy-ion collisions and investigate how they evolve through different stages of the fireball history and translate into final…

Nuclear Theory · Physics 2010-12-28 Guang-You Qin , Hannah Petersen , Steffen A. Bass , Berndt Müller

Hard partons which are produced copiously in nuclear collisions at the LHC, deposit most of their energy and momentum into the surrounding quark-gluon plasma. We show that this generates streams in the plasma and contributes importantly to…

Nuclear Theory · Physics 2015-01-06 Boris Tomasik , Martin Schulc

A significant fraction of the changes in momentum distributions induced by dissipative phenomena in the description of the fluid fireball created in ultrarelativistic heavy-ion collisions actually take place when the fluid turns into…

Nuclear Theory · Physics 2014-07-22 Christian Lang , Nicolas Borghini

We calculate the elliptic flow of bottomonia produced in Pb$\,+\,$Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV. We consider temperature-dependent decay widths for the anisotropic escape of various bottomonium states and observe that the…

High Energy Physics - Phenomenology · Physics 2021-07-09 Partha Pratim Bhaduri , Mubarak Alqahtani , Nicolas Borghini , Amaresh Jaiswal , Michael Strickland

Relativistic hydrodynamics has been extensively applied to high energy heavy-ion collisions. We review hydrodynamic calculations for Au+Au collisions at RHIC energies and provide a comprehensive comparison between the model and experimental…

Nuclear Theory · Physics 2007-05-23 Peter F. Kolb , Ulrich Heinz

Event-by-event fluctuations in the initial density distributions of the fireballs created in relativistic heavy-ion collisions lead to event-by-event fluctuations of the final anisotropic flow angles, and density inhomogeneities in the…

Nuclear Theory · Physics 2013-05-01 Ulrich W. Heinz , Zhi Qiu , Chun Shen

We propose that in nuclear collisions at the LHC the elliptic flow may get a contribution from leading hard and semihard partons which deposit energy and momentum into the hydrodynamic bulk medium. The crucial effect is that these partons…

Nuclear Theory · Physics 2015-05-27 Boris Tomasik , Peter Levai

The transverse momentum anisotropy of the particles produced in heavy ion collisions is one of the most important experimental observable to investigate the collective behavior of the systems created in such collisions. Recent studies show…

High Energy Physics - Phenomenology · Physics 2015-06-18 Jun Takahashi , Rafael Derradi de Souza , David Dobrigkeit Chinellato

The photon emission from the late stages of the dynamical evolution of heavy-ion reactions at the highest RHIC and LHC energies is investigated. A comparison between a calculation from hadronic rates from a fluid dynamic evolution down to…

We perform a systematic study on the decorrelation of anisotropic flows along the pseudorapidity in relativistic heavy-ion collisions at the LHC and RHIC energies. The dynamical evolution of the QGP fireball is simulated via the CLVisc…

Nuclear Theory · Physics 2018-08-29 Xiang-Yu Wu , Long-Gang Pang , Guang-You Qin , Xin-Nian Wang

The initial energy density distribution and fluctuation in the transverse direction lead to anisotropic flows of final hadrons through collective expansion in high-energy heavy-ion collisions. Fluctuations along the longitudinal direction,…

Nuclear Theory · Physics 2016-05-04 Long-Gang Pang , Hannah Petersen , Guang-You Qin , Victor Roy , Xin-Nian Wang
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