Kaon phase space density in heavy-ion collisions

Murray, M.

doi:10.1088/0954-3899/28/7/373

Cited by 3 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At √ s NN = 17.3 GeV, it was found that strong longitudinal flow could significantly reduce the space-averaged phase-space density of pions [40]. Also at this energy the inverse slope of the phase-space density was found to increase with particle mass in a manner suggestive of transverse flow [41]. Using the fact that the deuteron has energy E d = E n + E p and momentum P = 2p, Eq.…”

Section: B Average Phase-space Densitymentioning

confidence: 98%

Rapidity dependence of deuteron production in centralAu+Aucollisions atsNN=
Arsene¹,
Bearden²,
Beavis³
et al. 2011
Phys. Rev. C
20
0
2
0
View full text Add to dashboard Cite

We have measured the distributions of protons and deuterons produced in the 20% most central Au+Au collisions at RHIC ( √ s NN = 200 GeV) over a very wide range of transverse and longitudinal momentum. Near midrapidity we have also measured the distribution of antiprotons and antideuterons. We present our results in the context of coalescence models. In particular we extract the "homogeneity volume" and the average phase-space density for protons and antiprotons. Near central rapidity the coalescence parameter B2(pT ) and the space-averaged phase-space density f (pT ) are very similar for both protons and antiprotons. For protons we see little variation of either B2(pT ) or the space-averaged phase-space density as the rapidity increases from 0 to 3. However, these quantities depend strongly on pT at all rapidities. These results are in contrast to data from lower energy collisions where the proton and antiproton phase-space densities are different at y=0 and both B2 and f depend strongly on rapidity.

show abstract

Section: B Average Phase-space Densitymentioning

confidence: 98%

Rapidity dependence of deuteron production in centralAu+Aucollisions atsNN=
Arsene¹,
Bearden²,
Beavis³
et al. 2011
Phys. Rev. C
20
0
2
0
View full text Add to dashboard Cite

show abstract

“…Kaons, compared to pions, are expected to be less contaminated by resonance decays [18,20]. In addition the kaon phase space density is much smaller than the pion density [21]. As a consequence, higher multiparticle correlation effects (that may be important for pions at RHIC energies [22]) are possibly under much better control for kaons.…”

Section: Spacetime Evolution and Kaon Interferometrymentioning

confidence: 99%

(Strange) meson interferometry at RHIC

Soff

Bass

Hardtke

et al. 2002

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

We make predictions for the kaon interferometry measurements in Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). A first order phase transition from a thermalized Quark-Gluon-Plasma (QGP) to a gas of hadrons is assumed for the transport calculations. The fraction of kaons that are directly emitted from the phase boundary is considerably enhanced at large transverse momenta K T ∼ 1 GeV/c. In this kinematic region, the sensitivity of the Rout/R side ratio to the QGP-properties is enlarged. The results of the 1-dimensional correlation analysis are presented. The extracted interferometry radii, depending on K T , are not unusually large and are strongly affected by finite momentum resolution effects.

show abstract

“…In particular, the kaon density is much lower than the pion density [10]. Hence, multiparticle correlations that might play a role for the pions are of minor importance for the kaons.…”

mentioning

confidence: 98%

“…The correlations of kaons provide a severe test of the pion data and have several advantages [6]. In particular, the kaon density is much lower than the pion density [10]. Hence, multiparticle correlations that might play a role for the pions are of minor importance for the kaons.…”

mentioning

confidence: 99%

Particle correlations at RHIC — Scrutiny of a puzzle

et al. 2003

View full text Add to dashboard Cite

We present calculations of two-pion and two-kaon correlation functions in relativistic heavy ion collisions from a relativistic transport model that includes explicitly a first-order phase transition from a thermalized quark-gluon plasma to a hadron gas. We compare the obtained correlation radii with recent data from RHIC. The predicted R side radii agree with data while the R out and R long radii are overestimated. We also address the impact of in-medium modifications, for example, a broadening of the ρ-meson, on the correlation radii. In particular, the longitudinal correlation radius R long is reduced, improving the comparison to data. Two-particle correlations at small relative momenta have been predicted to be particularly sensitive to a phase transition from quark-gluon matter to hadronic matter [1]. For a first-order phase transition, larger hadronization times were expected to lead to considerably enhanced correlation radii, characterizing the space-time extension of the particle-emitting source, compared to, for example, a purely hadronic scenario. The radii should also depend on the critical temperature T c , the latent heat, the initial specific entropy density or the initial thermalization time of the quark-gluon phase.Here, we discuss relativistic transport calculations at RHIC energies that describe the initial dense stage by hydrodynamics [2] and the later more dilute stages by microscopic transport [3] of the particles. The two models are matched at the hadronization hypersurface [4]. In the hadronic phase the particles are allowed to rescatter and to excite resonances based on cross sections as measured in vacuum. For the initial dense (hydrodynamical) phase a bag model equation of state exhibiting a first-order phase transition is employed. Hence, a phase transition in local equilibrium that proceeds through the formation of a mixed phase, is considered. The details of this relativistic hybrid transport model can be found elsewhere [4].We first briefly summarize the main conclusions obtained in previous work [5,6,7]. Then, we show in detail the results for pions when calculating explicitly the correlation functions from the source function of the transport model. These results are subsequently compared to calculations that take in-medium modifications into account and to experimental data

show abstract

Kaon phase space density in heavy-ion collisions

Cited by 3 publications

References 11 publications

Rapidity dependence of deuteron production in centralAu+Aucollisions atsNN=
Arsene¹,
Bearden²,
Beavis³
et al. 2011
Phys. Rev. C
20
0
2
0
View full text Add to dashboard Cite

Rapidity dependence of deuteron production in centralAu+Aucollisions atsNN=
Arsene¹,
Bearden²,
Beavis³
et al. 2011
Phys. Rev. C
20
0
2
0
View full text Add to dashboard Cite

(Strange) meson interferometry at RHIC

Particle correlations at RHIC — Scrutiny of a puzzle

Contact Info

Product

Resources

About

Kaon phase space density in heavy-ion collisions

Cited by 3 publications

References 11 publications

Rapidity dependence of deuteron production in centralAu+Aucollisions atsNN=Arsene1, Bearden2, Beavis3 et al. 2011Phys. Rev. C20020View full textAdd to dashboardCite

Rapidity dependence of deuteron production in centralAu+Aucollisions atsNN=Arsene1, Bearden2, Beavis3 et al. 2011Phys. Rev. C20020View full textAdd to dashboardCite

(Strange) meson interferometry at RHIC

Particle correlations at RHIC — Scrutiny of a puzzle

Contact Info

Product

Resources

About

Rapidity dependence of deuteron production in centralAu+Aucollisions atsNN=
Arsene¹,
Bearden²,
Beavis³
et al. 2011
Phys. Rev. C
20
0
2
0
View full text Add to dashboard Cite

Rapidity dependence of deuteron production in centralAu+Aucollisions atsNN=
Arsene¹,
Bearden²,
Beavis³
et al. 2011
Phys. Rev. C
20
0
2
0
View full text Add to dashboard Cite