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, Byungsik Hong, K. Jayananda, D. Kraus, B. 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

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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, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume333
Issue number1-2
Publication statusPublished - 1994 Dec 1
Externally publishedYes

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Barrette, J., Bellwied, R., Braun-Munzinger, P., Cleland, W. E., 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., Shiva Kumar, B., ... Zou, C. (1994). Evidence for expansion of a hot fireball from two-pion correlations for Si + Pb collisions at AGS energy. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 333(1-2), 33-38.