Analytic nonlinear response coefficients for v2 and v4 in Gubser flow are derived, including a participant-plane angle factor that modifies strength and sign of the response.
Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at 2.76 TeV
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abstract
We report on the first measurement of the triangular $v_3$, quadrangular $v_4$, and pentagonal $v_5$ charged particle flow in Pb-Pb collisions at 2.76 TeV measured with the ALICE detector at the CERN Large Hadron Collider. We show that the triangular flow can be described in terms of the initial spatial anisotropy and its fluctuations, which provides strong constraints on its origin. In the most central events, where the elliptic flow $v_2$ and $v_3$ have similar magnitude, a double peaked structure in the two-particle azimuthal correlations is observed, which is often interpreted as a Mach cone response to fast partons. We show that this structure can be naturally explained from the measured anisotropic flow Fourier coefficients.
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representative citing papers
Lattice QCD results show the shear viscosity to entropy density ratio of gluon plasma reaches a minimum near the transition temperature Tc while the bulk viscosity to entropy density ratio decreases monotonically from 0.76 to 2.25 Tc.
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Mean transverse momentum fluctuations in baryon-rich matter are driven by energy and baryon density variations, remain robust to baryon diffusion, and show splitting between protons and antiprotons.
Species-resolved scaling functions for azimuthal anisotropy from iEBE-VISHNU simulations of Pb+Pb collisions collapse robustly across kinematics and species, enabling constraints on attenuation, collective expansion, and hadronic re-scattering via an energy-dependent baseline.
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citing papers explorer
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Nonlinear response of flow harmonics in Gubser flow with participant-reaction planes mismatch
Analytic nonlinear response coefficients for v2 and v4 in Gubser flow are derived, including a participant-plane angle factor that modifies strength and sign of the response.
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Shear and bulk viscosities of the gluon plasma across the transition temperature from lattice QCD
Lattice QCD results show the shear viscosity to entropy density ratio of gluon plasma reaches a minimum near the transition temperature Tc while the bulk viscosity to entropy density ratio decreases monotonically from 0.76 to 2.25 Tc.
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Sequential Bayesian inference with correlated heavy-ion datasets
Factorized sequential Bayesian updates on correlated pseudo-data produce systematic deviations from the joint posterior that increase with correlation strength, while exact conditional-likelihood updates match the joint result; an information decomposition attributes the mismatch to parameter-tuned,
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Rapidity dependence of mean transverse momentum fluctuation and decorrelation in baryon-dense medium
Mean transverse momentum fluctuations in baryon-rich matter are driven by energy and baryon density variations, remain robust to baryon diffusion, and show splitting between protons and antiprotons.
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Species-Resolved Scaling of Azimuthal Anisotropy: Constraining Attenuation, Collective Expansion, and Hadronic Dynamics in Hydrodynamic Simulations
Species-resolved scaling functions for azimuthal anisotropy from iEBE-VISHNU simulations of Pb+Pb collisions collapse robustly across kinematics and species, enabling constraints on attenuation, collective expansion, and hadronic re-scattering via an energy-dependent baseline.
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Bayesian inference constraints on jet quenching across centrality, beam energy, and observable classes in LHC heavy-ion collisions
Bayesian posteriors from JETSCAPE jet-quenching model are largely compatible across centrality but exhibit shifts across beam energy and observable class, with varying ability to predict complementary datasets.
- Explaining higher-order correlations between elliptic and triangular flow