Observation of a minimum in collective flow for Ar+V collisions

Krofcheck, D.; Cebra, D.; Cronqvist, M.; Lacey, R.; Li, T.; Ogilvie, C. A.; Molen, A. Vander; Tyson, K.; Westfall, G. D.; Wilson, W.K.; Winfield, J. S.; Nadasen, A.; Norbeck, E.

doi:10.1103/physrevc.43.350

Cited by 48 publications

(27 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This program is analogous to what was accomplished at lower energies of 30 to 1000 MeV per nucleon beam energies in the lab frame. At those energies, it was possible to infer the compressibility of nuclear matter and the momentum-dependence of the nuclear optical potential via the transverse momentum distribution relative to the reaction plane [66] and via the balance between attractive and repulsive scattering [67].…”

Section: Observable Consequencesmentioning

confidence: 99%

Viscous Properties of Strongly Interacting Matter at High Temperature

Kapusta

2010

Relativistic Heavy Ion Physics

View full text Add to dashboard Cite

Substantial collective flow is observed in collisions between large nuclei at high energy, and the data are well-reproduced by perfect fluid dynamics. In a separate development, calculation of the dimensionless ratio of shear viscosity η to entropy density within AdS/CFT yields η/s = 1/4π, which has been conjectured to be a lower bound for any physical system. It is shown that the transition from hadrons to quarks and gluons has behavior similar to helium, nitrogen, and water at and near their phase transitions in the ratio η/s. Conversely, there are indications that the ratio of bulk viscosity ζ to entropy density may have a maximum in the vicinity of the phase transition. Therefore it is possible that experimental measurements can pinpoint the location of the transition or rapid crossover in QCD via the ratios η/s and ζ/s in addition to and independently of the equation of state.

show abstract

Section: Observable Consequencesmentioning

confidence: 99%

Viscous Properties of Strongly Interacting Matter at High Temperature

Kapusta

2010

Relativistic Heavy Ion Physics

View full text Add to dashboard Cite

show abstract

“…The predicted EVF for light systems go above the experimental ones while the predicted EVF for heavier systems remain below the corresponding experimental one [12]. For a single system, the quantitative reproducing of the EVF can be reached by changing the nucleon-nucleon cross section with momentum independent potential in [9] or with the momentum dependent potential in [8]. But the mass dependence of EVF cannot be reproduced quantitatively by the VUU calculation with the momentum independent potential shown in [12].Furthermore, it is known from Ref.…”

mentioning

confidence: 99%

“…3 we show the mass dependence of the EVF calculated with a soft EOS (K= 210 and m */m = 0.85) and different n-n cross sections. The solid squares indicate the experimental data [8,12]. To investigate the contribution of the nuclear mean field, we first turn off the collision term and calculate the mass dependence of EVF.…”

mentioning

confidence: 99%

Momentum dependent Vlasov-Uehling-Uhlenbeck calculation of mass dependence of the flow disappearance in heavy-ion collisions

Zhou

1994

Phys. Rev. C

View full text Add to dashboard Cite

We perform calculations for different systems to study the mass dependence of flow disappearance in heavy-ion collisions in a relativistic Vlasov-Uehling-Uhlenbeck approach based on Walecka s cr-co model. We find that the mass dependence of the energy of vanishing flow is the result of a complex interplay among the momentum dependence of the nuclear mean field, Coulomb potential, and n-n collisions. The effect of the n-n collisions is predominant and the particular scaling value (A " ) of the mass dependence can be related to the scaling behavior of the collision number per nucleon.PACS number(s): 25.70. Pq, 24.10.Jv

show abstract

“…It was possible to infer the compressibility of nuclear matter and the momentum-dependence of the nuclear optical potential via the transverse momentum distribution relative to the reaction plane [23] and via the balance between attractive and repulsive scattering [24]. There is much to be learned about QCD at high energy densities.…”

mentioning

confidence: 99%

Strongly Interacting Low-Viscosity Matter Created in Relativistic Nuclear Collisions

2006

View full text Add to dashboard Cite

Substantial collective flow is observed in collisions between large nuclei at RHIC (Relativistic Heavy Ion Collider) as evidenced by single-particle transverse momentum distributions and by azimuthal correlations among the produced particles. The data are well-reproduced by perfect fluid dynamics. A calculation of the dimensionless ratio of shear viscosity η to entropy density s by Kovtun, Son and Starinets within anti-de Sitter space/conformal field theory yields η/s =h/4πk B which has been conjectured to be a lower bound for any physical system. Motivated by these results, we show that the transition from hadrons to quarks and gluons has behavior similar to helium, nitrogen, and water at and near their phase transitions in the ratio η/s. We suggest that experimental measurements can pinpoint the location of this transition or rapid crossover in QCD.

show abstract

Observation of a minimum in collective flow for Ar+V collisions

Cited by 48 publications

References 11 publications

Viscous Properties of Strongly Interacting Matter at High Temperature

Viscous Properties of Strongly Interacting Matter at High Temperature

Momentum dependent Vlasov-Uehling-Uhlenbeck calculation of mass dependence of the flow disappearance in heavy-ion collisions

Strongly Interacting Low-Viscosity Matter Created in Relativistic Nuclear Collisions

Contact Info

Product

Resources

About