Differential elliptic flow of identified hadrons and constituent quark number scaling at the GSI Facility for Antiproton and Ion Research (FAIR)

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.034906· OSTI ID:21386700

Bhaduri, Partha Pratim; Chattopadhyay, Subhasis ^[1]

---

1. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064 (India)

Differential elliptic flow v{sub 2}(p{sub T}) for identified hadrons is investigated in the FAIR energy regime, employing a hadronic-string transport model (UrQMD) as well as a partonic transport model (AMPT). It is observed that both models show a mass ordering of v{sub 2} at low p{sub T} and a switch-over resulting in a baryon-meson crossing at intermediate p{sub T}. AMPT generates higher v{sub 2} values compared to UrQMD. In addition, constituent quark number scaling behavior of elliptic flow is addressed. Scaling behavior in terms of the transverse momentum p{sub T} is found to be absent for both the partonic and the hadronic model. However, UrQMD and AMPT with a string melting scenario do exhibit an NCQ scaling of v{sub 2} to varying degrees, with respect to the transverse kinetic energy KE{sub T}. But the default AMPT, where partonic scatterings are not included, does not show any considerable scaling behavior. A variable {alpha} is defined to quantify the degree of KE{sub T} scaling. We found that UrQMD gives better scaling than AMPT at FAIR.

• OSTI ID: 21386700
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevC.81.034906; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIPROTONS
HADRONS
IONS
KINETIC ENERGY
MASS
MESONS
QUARKS
SCALING
SCATTERING
STRING MODELS
TRANSPORT THEORY
TRANSVERSE MOMENTUM
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
BARYONS
BOSONS
CHARGED PARTICLES
COMPOSITE MODELS
ELEMENTARY PARTICLES
ENERGY
EXTENDED PARTICLE MODEL
FERMIONS
LINEAR MOMENTUM
MATHEMATICAL MODELS
MATTER
NUCLEI
NUCLEONS
PARTICLE MODELS
PROTONS
QUARK MODEL