Multi-messenger heavy-ion collision physics

Abstract

This work studies the production of direct photons in relativistic nuclear collisions, along with the production of hadrons. Radiation from the very first instants to the final moments of the evolution is included. The hybrid model used here describes all stages of relativistic heavy-ion collisions. Chronologically, those are an initial state reflecting the collision of nuclei described within the Color Glass Condensate effective theory; a pre-equilibrium phase based on non-equilibrium linear response; relativistic viscous hydrodynamics, and a hadronic afterburner. The effect of the pre-equilibrium phase on both photonic and hadronic observables is highlighted for the first time. The potential of photon observables -- spectrum, differential elliptic and triangular flow -- to reveal the chemical equilibration time is studied. Finally, we consider "small collision systems", including proton+nucleus collisions and collisions of light nuclei, as probed by hadronic and electromagnetic observables. We demonstrate how photon production can signal the formation of quark-gluon plasma in such small systems.

15 pages, 20 figures. Version updated to match published version (including title modification)

References in corpus (14)

• The equation of state in (2+1)-flavor QCD
• Elliptic and triangular flow in event-by-event (3+1)D viscous hydrodynamics
• Event-by-event gluon multiplicity, energy density and eccentricities at RHIC and LHC
• Constraining the Eq. of State of Super-Hadronic Matter from Heavy-Ion Collisions
• Collectivity and electromagnetic radiation in small systems
• Thermal photon $v_2$ with slow quark chemical equilibration
• Causality violations in realistic simulations of heavy-ion collisions
• Hydrodynamization and non-equilibrium Green's functions in kinetic theory
• Exploring theoretical uncertainties in the hydrodynamic description of relativistic heavy-ion collisions
• Bulk Viscosity and Relaxation Time of Causal Dissipative Relativistic Fluid Dynamics
• Photon emission from quark-gluon plasma out of equilibrium
• Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion Collisions
• Ultrarelativistic heavy ion collisions: the first billion seconds
• Direct photon calculations in heavy-ion collisions at s(NN)**1/2 = 62.4 - 200 AGeV in a (3+1) dimensional hybrid approach

Cited by in corpus (32)

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• The Present and Future of QCD
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• Early-times Yang-Mills dynamics and the characterization of strongly interacting matter with statistical learning
• Dilepton production at next-to-leading order and intermediate invariant-mass observables
• Opacity dependence of transverse flow, pre-equilibrium and applicability of hydrodynamics in heavy-ion collisions
• Nonprompt direct-photon production in Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Mini-jet quenching in a concurrent jet+hydro evolution and the non-equilibrium quark-gluon plasma
• Statistical analysis of initial state and final state response in heavy-ion collisions
• Flow correlations from a hydrodynamics model with dynamical freeze-out and initial conditions based on perturbative QCD and saturation
• Anisotropic photon emission from gluon fusion and splitting in a strong magnetic background I: The two-gluon one-photon vertex
• Leading order, next-to-leading order, and non-perturbative parton collision kernels: effects in static and evolving media
• Pre-Equilibrium Evolution of Conserved Charges with ICCING Initial Conditions
• Radiative hadronization: Photon emission at hadronization from quark-gluon plasma
• Pre-hydrodynamic evolution and its impact on quark-gluon plasma signatures
• A Gaussian Process Generative Model for QCD Equation of State
• Interplay of longitudinal and transverse expansion in the kinetic dynamics of heavy-ion collisions
• Multimessenger study of baryon-charged QCD matter in heavy-ion collisions
• Jet-medium photons as a probe of parton dynamics
• Thermal dilepton production within conformal viscous Gubser flow
• Two-gluon one-photon vertex in a magnetic field and its explicit one-loop approximation in the intermediate field strength regime
• Direct-photon production in inelastic and high-multiplicity proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Describing the Thermal Radiation in $Au+Au$ Collisions at $\sqrt{s_{NN}}=$200 GeV by an Analytic Solution of Relativistic Hydrodynamics
• Solving the QCD effective kinetic theory with neural networks
• Photon emissivity of the quark-gluon plasma: a lattice QCD analysis of the transverse channel
• Hydrodynamic model of heavy-ion collisions with low momentum components
• Hydrodynamic description of direct photon spectra and elliptic flow in Pb+Pb collisions at LHC
• Geometrical Scaling of Direct Photons in Relativistic Heavy Ion and d+Au Collisions
• Photon emission from weakly magnetized neutral pions
• Rotating synchrotron radiation: Photon emission from magnetized and rotating quark-gluon plasma
• Glauber quark and gluon contributions to quark energy loss at next-to-leading order and next-to-leading twist
• Dileptons at Colliders as Probes of the Quark-Gluon Plasma