TY - GEN

T1 - One fluid might not rule them all

AU - Zhou, You

AU - Zhao, Wenbin

AU - Murase, Koichi

AU - Song, Huichao

PY - 2021/1/1

Y1 - 2021/1/1

N2 - In this proceeding, we present our recent investigations on hydrodynamic collectivity in high-multiplicity proton-proton collisions at root s = 13 TeV using the iEBE-VISHNU hybrid model with different initial condition models, called HIJING, super-MC and TRENTo. We find that with carefully tuned parameters, hydrodynamic simulations can give reasonable descriptions of the measured two-particle correlations. However, multi-particle single and mixed harmonics cumulants can not be described by hydrodynamics with these three initial conditions, even for the signs in a few cases. Further studies show that the non-linear response plays an important role in the hydrodynamic expansion of the p-p systems. Such an effect can change c(2){4} from a negative value in the initial state to a positive value in the final state. The failure of the hydrodynamic description of multi-particle cumulant triggers the questions on whether the hydrodynamics can rule all collision systems, including p-p collisions at the LHC.

AB - In this proceeding, we present our recent investigations on hydrodynamic collectivity in high-multiplicity proton-proton collisions at root s = 13 TeV using the iEBE-VISHNU hybrid model with different initial condition models, called HIJING, super-MC and TRENTo. We find that with carefully tuned parameters, hydrodynamic simulations can give reasonable descriptions of the measured two-particle correlations. However, multi-particle single and mixed harmonics cumulants can not be described by hydrodynamics with these three initial conditions, even for the signs in a few cases. Further studies show that the non-linear response plays an important role in the hydrodynamic expansion of the p-p systems. Such an effect can change c(2){4} from a negative value in the initial state to a positive value in the final state. The failure of the hydrodynamic description of multi-particle cumulant triggers the questions on whether the hydrodynamics can rule all collision systems, including p-p collisions at the LHC.

KW - hydrodynamics

KW - flow

KW - proton-proton collisions

KW - COLLECTIVITY

KW - COLLISIONS

U2 - 10.1016/j.nuclphysa.2020.121908

DO - 10.1016/j.nuclphysa.2020.121908

M3 - Conference article

VL - 1005

JO - Nuclear Physics A: Nuclear and Hadronic Physics

JF - Nuclear Physics A: Nuclear and Hadronic Physics

SN - 0375-9474

M1 - 121908

T2 - 28th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter)

Y2 - 4 November 2019 through 9 November 2019

ER -