Splitting of proton-antiproton directed flow in relativistic heavy-ion collisions

Abstract

The rapidity dependent directed flow of particles produced in a relativistic heavy ion collision can be generated in the hydrodynamic expansion of a tilted source. The asymmetry of the pressure leads to a build up of a directed flow of matter with respect to the collision axis. The experimentally observed ordering of the directed flow of baryons, pions and antibaryons can be described as resulting from the expansion of a baryon inhomogeneous fireball. An uneven distribution of baryons in the transverse plane leads to an asymmetry in the collective push for protons and antiprotons. Precise measurements of the collective flow as a function of rapidity could serve as a strong constraint on mechanism of baryon stopping in the early phase of the collision.

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Cited by in corpus (11)

• The QCD phase diagram and Beam Energy Scan physics: a theory overview
• Probing initial baryon stopping and equation of state with rapidity-dependent directed flow of identified particles
• Hyperon polarization and its relation with directed flow in high-energy nuclear collisions
• Directed flow and global polarization in Au+Au collisions across energies covered by the beam energy scan at RHIC
• Anisotropy of magnetized quark matter
• Anti-flow of Mesons in the High Baryon Density Region
• Interplay of longitudinal and transverse expansion in the kinetic dynamics of heavy-ion collisions
• Effect of hadronic interaction on the flow of $K^{\ast 0}$
• Exploring Electromagnetic Field Effects and Constraining Transport Parameters of QGP using STAR BES-II data
• Rapidity dependence of mean transverse momentum fluctuation and decorrelation in baryon-dense medium
• Electric-charge-dependent directed flow splitting of produced quarks in Au+Au collisions