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

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

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

The two-pion correlation function has been measured for charged pions produced in central 14.6 A GeV/c Si + Pb collisions at the AGS. Data for like-sign pions show a clear quantum interference effect as expected for identical bosons. The experimental correlation function agrees well with that obtained for events generated by a cascade code (RQMD). The present data are consistent with a time-averaged rms freeze-out radius of 8.3 fm and a mean duration of pion emission of 9 fm/c. The system has expanded considerably before freeze-out.

Original languageEnglish
Pages (from-to)33-38
Number of pages6
JournalPhysics Letters B
Volume333
Issue number1-2
DOIs
Publication statusPublished - 1994 Jul 28
Externally publishedYes

Bibliographical note

Funding Information:
We thankt he AGS staff and, in particularD, r. H. Brown and W. McGahernf or theire xcellenst upport. We also thankR . Hutterf or tirelesste chnicasl upport. Drs. H. Sorgea ndS. Prattk indlyg aveu s permission to use theirc omputecro des.T his work was supported by the DoE, the NSE the NSERC (Canada)a, ndthe CNPq (Brazil).

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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