Charge balancing and the fall off of the ridge

Abstract

Two-dimensional correlation functions in $\Delta \eta -\Delta \varphi$ for charged hadrons emitted in heavy-ion collisions are calculated in event-by-event hydrodynamics. With the Glauber model for the initial density distributions in the transverse plane and elongated density profiles in the longitudinal direction, the flow patterns in the azimuthal angle of the two-dimensional correlation function are properly reproduced. We show that the additional fall-off of the same-side ridge in the longitudinal direction can be explained as an effect of local charge conservation at a late stage of the evolution. This additional non-flow effect increases the harmonic flow coefficients for the unlike-sign particle pairs.

talk given at Quark Matter 2012, August 13-18, Washington D.C., USA

References in corpus (7)

• Charge conservation in RHIC and contributiuons to local parity violation observables
• GLISSANDO: GLauber Initial-State Simulation AND mOre
• Long Range Correlations and the Soft Ridge in Relativistic Nuclear Collisions
• Charge-Dependent Correlations in Relativistic Heavy Ion Collisions and the Chiral Magnetic Effect
• Transverse-momentum fluctuations in relativistic heavy-ion collisions from event-by-event viscous hydrodynamics
• Charge conservation and the shape of the ridge of two-particle correlations in relativistic heavy-ion collisions
• Collective flow effects on charge balance correlations and local parity-violation observables in $\sqrt{s_{NN}}=2.76$ TeV Pb+Pb collisions at the LHC

Cited by in corpus (1)

• Balance functions of charged hadron pairs $(\pi ,K,p)\otimes (\pi ,K,p)$ in Pb--Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$2.76 TeV