Beam-Energy Dependence of Directed Flow ofΛ,Λ¯,K±,Ks0, andϕinAu+AuCollisions

2017/08/31 by STAR Collaboration, L. Adamczyk, J. R. Adams +358 · 5 citations
Physics and Astronomy · #Coalescence (physics) #Energy (signal processing) #Hadron #High-Energy Particle Collisions Research #Lambda #Mathematical physics #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Rapidity #hep-ex #nucl-ex

paper · pdf · doi:10.1103/physrevlett.120.062301

published as Phys. Rev. Lett. 120, 062301 (2018) · 7 pages, 3 figures, STAR collaboration. Revised version accepted by PRL

openalex created_date 2017/08/31 · arxiv created 2018/01/15 · openalex publication_date 2018/02/06 · arxiv updated 2018/02/14 · openalex updated_date 2026/08/01

Abstract

Rapidity-odd directed-flow measurements at midrapidity are presented for Λ, Λ[over ¯], K^±, K_s⁰, and ϕ at sqrt[s_NN]=7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV in Au+Au collisions recorded by the Solenoidal Tracker detector at the Relativistic Heavy Ion Collider. These measurements greatly expand the scope of data available to constrain models with differing prescriptions for the equation of state of quantum chromodynamics. Results show good sensitivity for testing a picture where flow is assumed to be imposed before hadron formation and the observed particles are assumed to form via coalescence of constituent quarks. The pattern of departure from a coalescence-inspired sum rule can be a valuable new tool for probing the collision dynamics.

Citations

• Observation of the antimatter helium-4 nucleus
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Microscopic models for ultrarelativistic heavy ion collisions
• The STAR time projection chamber: a unique tool for studying high multiplicity events at RHIC
• Experimental and theoretical challenges in the search for the quark–gluon plasma: The STAR Collaboration's critical assessment of the evidence from RHIC collisions
• The First Moment of Azimuthal Anisotropy in Nuclear Collisions from AGS to LHC Energies
• Collective flow signals the quark–gluon plasma

Cited by

• Momentum-dependent potential and collective flows within the relativistic quantum molecular dynamics approach based on relativistic mean-field theory
• Dependence on beam energy and nuclear equation of state of anisotropic flow and particle production in low-energy heavy-ion collisions
• Elliptic flow splitting between protons and antiprotons from hadronic potentials
• Disappearance of partonic collectivity in √s_NN = 3 GeV Au+Au collisions at RHIC
• Bulk properties of the system formed in Au+Au collisions at sNN=14.5 GeV at the BNL STAR detector