Disappearance of the Mach Cone in heavy ion collisions

Abstract

We present an analysis of di-hadron correlations using recently developed methods for background subtraction which allow for higher precision measurements with fewer assumptions about the background. These studies indicate that low momentum jets interacting with the medium do not equilibrate with the medium, but rather that interactions with the medium lead to more subtle increases in their widths and fragmentation functions, consistent with observations from studies of higher momentum fully reconstructed jets. The away-side shape is not consistent with a Mach cone.

References in corpus (44)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• The PHOBOS Perspective on Discoveries at RHIC
• Tuning Monte Carlo Generators: The Perugia Tunes
• Transverse momentum and collision energy dependence of high $p_T$ hadron suppression in Au+Au collisions at ultrarelativistic energies
• Disappearance of back-to-back high $p_T$ hadron correlations in central Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at 2.76 TeV
• Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Distributions of Charged Hadrons Associated with High Transverse Momentum Particles in pp and Au+Au Collisions at sqrt(s_NN)=200 GeV
• Study of high-pT charged particle suppression in PbPb compared to pp collisions at sqrt(sNN)=2.76 TeV
• Suppressed pi^0 Production at Large Transverse Momentum in Central Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Measurements of Higher-Order Flow Harmonics in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Dihadron azimuthal correlations in Au+Au collisions at sqrt(s_NN)=200 GeV
• Long range rapidity correlations and jet production in high energy nuclear collisions
• Modifications to Di-Jet Hadron Pair Correlations in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Direct observation of dijets in central Au+Au collisions at sqrt(s_NN) = 200 GeV
• Measurement of jet fragmentation in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV
• Measurement of event-plane correlations in sqrt(s_NN)=2.76 TeV lead-lead collisions with the ATLAS detector
• Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV with the ATLAS detector
• Third Harmonic Flow of Charged Particles in Au+Au Collisions at sqrtsNN = 200 GeV
• Particle-yield modification in jet-like azimuthal di-hadron correlations in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Decomposition of Harmonic and Jet Contributions to Particle-pair Correlations at Ultra-relativistic Energies
• Indications of Conical Emission of Charged Hadrons at the BNL Relativistic Heavy Ion Collider
• Transverse momentum and centrality dependence of dihadron correlations in Au+Au collisions at sqrt(s_NN)=200 GeV: Jet-quenching and the response of partonic matter
• Implications of space-momentum correlations and geometric fluctuations in heavy-ion collisions
• Azimuthal di-hadron correlations in d+Au and Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV from STAR
• System Size and Energy Dependence of Jet-Induced Hadron Pair Correlation Shapes in Cu+Cu and Au+Au Collisions at sqrt(s_NN) = 200 and 62.4 GeV
• Jet Structure from Dihadron Correlations in d+Au collisions at sqrt(s_NN) = 200 GeV
• Medium modification of jet fragmentation in Au+Au collisions at sqrt(s_NN)=200 GeV measured in direct photon-hadron correlations
• Elliptic flow contribution to two-particle correlations at different orientations to the reaction plane
• Pseudorapidity dependence of charged hadron transverse momentum spectra in d+Au collisions at sqrt sNN = 200 GeV
• Transition From Ideal To Viscous Mach Cones In A Kinetic Transport Approach
• Interplay between Mach cone and radial expansion and its signal in $\gamma$-jet events
• System size and energy dependence of near-side di-hadron correlations
• Event-plane dependent dihadron correlations with harmonic $v_n$ subtraction in Au+Au Collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=200$ GeV
• Mach cones in viscous heavy-ion collisions
• Azimuthal anisotropy in a jet absorption model with fluctuating initial geometry in heavy ion collisions
• Background subtraction methods for precision measurements of di-hadron and jet-hadron correlations in heavy ion collisions
• System size dependence of associated yields in hadron-triggered jets
• Head shock vs Mach cone: azimuthal correlations from 2 to 3 parton processes in relativistic heavy-ion collisions
• Suppression of away-side jet fragments with respect to the reaction plane in Au+Au collisions at sqrt(s_NN) = 200 GeV

Cited by in corpus (11)

• Review of Jet Measurements in Heavy Ion Collisions
• Measurement of two-particle correlations with respect to second- and third-order event planes in Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Leading order, next-to-leading order, and non-perturbative parton collision kernels: effects in static and evolving media
• Event-plane dependent di-hadron correlations with harmonic $v_n$ subtraction in a hydrodynamic model
• Sound propagation and Mach cone in anisotropic hydrodynamics
• Jet-hadron correlations measured relative to the second order event plane in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Event plane dependence of the flow modulated background in di-hadron and jet-hadron correlations in heavy ion collisions
• Fluidity of the system produced in relativistic pp and heavy-ion collisions: Hadron resonance gas model approach
• Jet-hadron correlations relative to the event plane at the LHC with ALICE
• Centrality and transverse momentum dependence of dihadron correlations in a hydrodynamic model
• Reexamining the iconic dihadron correlation measurement demonstrating jet quenching