Evidence for expansion of a hot fireball from two-pion correlations for Si + Pb collisions at AGS energy

Barrette, J.; Bellwied, R.; Braun‐Munzinger, P.; Cleland, W.; Cormier, T. M.; David, G.; Dee, J.; Diebold, G. E.; Dietzsch, O.; Germani, J. V.; Gilbert, S.; Greene, S. V.; Hall, J. R.; Hemmick, T. K.; Herrmann, N.; Hong, B.; Jayananda, K.; Kraus, D.; Kumar, Deekshit; Lacasse, R.; Lissauer, D.; Llope, W. J.; Ludlam, T.; McCorkle, S.; Majka, R.; Mark, S. K.; Mitchell, J. T.; Muthuswamy, Moorthy S.; O’Brien, E.; Panitkin, S.; Pruneau, C.; Rao, M. N.; Rotondo, F. S.; daSilva, N. C.; Sonnadara, D. U. J.; Stachel, J.; Takai, H.; Takagui, E. M.; Throwe, T. G.; Voloshin, S. A.; Wang, G.; Wolfe, D.; Woody, C. L.; Xu, N.; Zhang, Y.; Zhang, Z.; Zou, C.

doi:10.1016/0370-2693(94)91004-9

Cited by 26 publications

(8 citation statements)

References 34 publications

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“…Here, the corresponding π + and proton densities of 0.051/fm 3 and 0.053/fm 3 agree well with those estimated from particle interferometry [24,25] (0.058/fm 3 and 0.063/fm 3 , respectively) implying that, at AGS energy, thermal and chemical freeze-out take place at nearly identical temperatures.…”

supporting

confidence: 83%

Chemical equilibration in Pb+Pb collisions at the SPS

1999

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supporting

confidence: 83%

Chemical equilibration in Pb+Pb collisions at the SPS

1999

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“…(68)) shows that the source expands by at least a factor ξ = 1.8. As their measured correlation functions agreed with those from the RMQD model, the E814 collaboration used RQMD to correct for the flow effects [97]. They inferred an expansion factor ξ = 2.7 by comparing R t = x 2 + y 2 from RQMD with the 2-dimensional radius of the projectile in the transverse plane (see Sec.…”

Section: From P+p To Pb+pb Collisionsmentioning

confidence: 86%

“…Many features in p-nucleus and nucleus-nucleus collisions which can be related to secondary scattering are well described by RQMD [95,96]. The numerous secondary collisions result in considerable transverse flow of RQMD events before freeze-out [56,78,97]. The kaon distributions are narrower than those of the pions.…”

Section: Rqmdmentioning

confidence: 99%

TWO-PARTICLECORRELATIONS INRELATIVISTICHEAVY-IONCOLLISIONS

Heinz

Jacak

1999

Annu. Rev. Nucl. Part. Sci.

235

250

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ABSTRACT:Two-particle momentum correlations between pairs of identical particles produced in relativistic heavy-ion reactions can be analyzed to extract the space-time structure of the collision fireball. We review recent progress in the application of this method, based on newly developed theoretical tools and new high-quality data from heavy-ion collision experiments. Implications for our understanding of the collision dynamics and for the search for the quark-gluon plasma are discussed.

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“…Eqs. (14,17,18) reveal two suppression effects on the particle number, entropy and energy densities because of the VDW repulsion, namely 1). The modification of the chemical potential µ →μ as given in Eq.…”

Section: Formulationmentioning

confidence: 99%

Excluded volume hadron gas model for particle number ratios inA+Acollisions

et al. 1997

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We recapitulate a thermodynamically consistent excluded volume hadron gas model and examine its differences with other "thermal models" used in the literature. Preliminary experimental data for particle number ratios in the collisions of Au+Au at the BNL AGS (11A GeV/c) and Pb+Pb at the CERN SPS (160A GeV/c) are analyzed. For equal values of the hadron hardcore parameters the excluded volume model gives essentially the ideal gas predictions for the particle number ratios, which is similar to other thermal models. We observe, however, the systematic excess of experimental pion abundances compared to the ideal gas results. This effect can be explained in our model by a smaller pion hard-core volume compared to those of other hadrons. The absolute values for particle number and energy densities at the chemical freezeout are predicted with a simultaneous fit to all these AGS and SPS particle number ratios. PACS number(s): 25.75.-q, 24.10.Pa Typeset using REVT E X

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Evidence for expansion of a hot fireball from two-pion correlations for Si + Pb collisions at AGS energy

Cited by 26 publications

References 34 publications

Chemical equilibration in Pb+Pb collisions at the SPS

Chemical equilibration in Pb+Pb collisions at the SPS

TWO-PARTICLECORRELATIONS INRELATIVISTICHEAVY-IONCOLLISIONS

Excluded volume hadron gas model for particle number ratios inA+Acollisions

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