Energy and charged particle flow in 10.8A GeV/c Au+Au collisions

J. Barrette, R. Bellwied, S. Bennett, P. Braun-Munzinger, W. C. Chang, W. E. Cleland, M. Clemen, J. Cole, T. M. Cormier, G. David, J. Dee, O. Dietzsch, M. Drigert, J. R. Hall, T. K. Hemmick, N. Herrmann, Byungsik Hong, Y. Kwon, R. Lacasse, A. Lukaszew & 24 others Q. Li, T. W. Ludlam, S. K. Mark, R. Matheus, S. McCorkle, J. T. Murgatroyd, E. O'Brien, S. Panitkin, T. Piazza, C. Pruneau, M. N. Rao, M. Rosati, N. C. Da Silva, S. Sedykh, U. Sonnadara, J. Stachel, E. M. Takagui, S. Voloshin, G. Wang, J. P. Wessels, C. L. Woody, N. Xu, Y. Zhang, C. Zou

Research output: Contribution to journalArticle

135 Citations (Scopus)

Abstract

Experimental results and a detailed analysis are presented of the transverse energy and charged particle azimuthal distributions measured by the E877 Collaboration for different centralities of Au+Au collisions at a beam momentum of 10.8A GeV/c. The anisotropy of these distributions is studied with respect to the reaction plane reconstructed on an event-by-event basis using the transverse energy distribution measured by calorimeters. Results are corrected for the reaction plane resolution. For semicentral events we observe directed flow signals of up to 10%. We observe a stronger anisotropy for slow charged particles. For both the charged particle and transverse energy distributions we observe a small but nonzero elliptic anisotropy with the major axis pointing into the reaction plane. Combining the information on transverse energy and charged particle flow we obtain information on the flow of nucleons and pions. The data are compared to event generators and the need to introduce a mean field or nucleon-nucleon potential is discussed.

Original languageEnglish
Pages (from-to)1420-1430
Number of pages11
JournalPhysical Review C - Nuclear Physics
Volume55
Issue number3
Publication statusPublished - 1997 Mar 1
Externally publishedYes

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particle energy
charged particles
collisions
anisotropy
energy distribution
nucleon potential
nucleons
calorimeters
pions
generators
momentum

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Barrette, J., Bellwied, R., Bennett, S., Braun-Munzinger, P., Chang, W. C., Cleland, W. E., ... Zou, C. (1997). Energy and charged particle flow in 10.8A GeV/c Au+Au collisions. Physical Review C - Nuclear Physics, 55(3), 1420-1430.

Energy and charged particle flow in 10.8A GeV/c Au+Au collisions. / Barrette, J.; Bellwied, R.; Bennett, S.; Braun-Munzinger, P.; Chang, W. C.; Cleland, W. E.; Clemen, M.; Cole, J.; Cormier, T. M.; David, G.; Dee, J.; Dietzsch, O.; Drigert, M.; Hall, J. R.; Hemmick, T. K.; Herrmann, N.; Hong, Byungsik; Kwon, Y.; Lacasse, R.; Lukaszew, A.; Li, Q.; Ludlam, T. W.; Mark, S. K.; Matheus, R.; McCorkle, S.; Murgatroyd, J. T.; O'Brien, E.; Panitkin, S.; Piazza, T.; Pruneau, C.; Rao, M. N.; Rosati, M.; Da Silva, N. C.; Sedykh, S.; Sonnadara, U.; Stachel, J.; Takagui, E. M.; Voloshin, S.; Wang, G.; Wessels, J. P.; Woody, C. L.; Xu, N.; Zhang, Y.; Zou, C.

In: Physical Review C - Nuclear Physics, Vol. 55, No. 3, 01.03.1997, p. 1420-1430.

Research output: Contribution to journalArticle

Barrette, J, Bellwied, R, Bennett, S, Braun-Munzinger, P, Chang, WC, Cleland, WE, Clemen, M, Cole, J, Cormier, TM, David, G, Dee, J, Dietzsch, O, Drigert, M, Hall, JR, Hemmick, TK, Herrmann, N, Hong, B, Kwon, Y, Lacasse, R, Lukaszew, A, Li, Q, Ludlam, TW, Mark, SK, Matheus, R, McCorkle, S, Murgatroyd, JT, O'Brien, E, Panitkin, S, Piazza, T, Pruneau, C, Rao, MN, Rosati, M, Da Silva, NC, Sedykh, S, Sonnadara, U, Stachel, J, Takagui, EM, Voloshin, S, Wang, G, Wessels, JP, Woody, CL, Xu, N, Zhang, Y & Zou, C 1997, 'Energy and charged particle flow in 10.8A GeV/c Au+Au collisions', Physical Review C - Nuclear Physics, vol. 55, no. 3, pp. 1420-1430.
Barrette J, Bellwied R, Bennett S, Braun-Munzinger P, Chang WC, Cleland WE et al. Energy and charged particle flow in 10.8A GeV/c Au+Au collisions. Physical Review C - Nuclear Physics. 1997 Mar 1;55(3):1420-1430.
Barrette, J. ; Bellwied, R. ; Bennett, S. ; Braun-Munzinger, P. ; Chang, W. C. ; Cleland, W. E. ; Clemen, M. ; Cole, J. ; Cormier, T. M. ; David, G. ; Dee, J. ; Dietzsch, O. ; Drigert, M. ; Hall, J. R. ; Hemmick, T. K. ; Herrmann, N. ; Hong, Byungsik ; Kwon, Y. ; Lacasse, R. ; Lukaszew, A. ; Li, Q. ; Ludlam, T. W. ; Mark, S. K. ; Matheus, R. ; McCorkle, S. ; Murgatroyd, J. T. ; O'Brien, E. ; Panitkin, S. ; Piazza, T. ; Pruneau, C. ; Rao, M. N. ; Rosati, M. ; Da Silva, N. C. ; Sedykh, S. ; Sonnadara, U. ; Stachel, J. ; Takagui, E. M. ; Voloshin, S. ; Wang, G. ; Wessels, J. P. ; Woody, C. L. ; Xu, N. ; Zhang, Y. ; Zou, C. / Energy and charged particle flow in 10.8A GeV/c Au+Au collisions. In: Physical Review C - Nuclear Physics. 1997 ; Vol. 55, No. 3. pp. 1420-1430.
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AU - Chang, W. C.

AU - Cleland, W. E.

AU - Clemen, M.

AU - Cole, J.

AU - Cormier, T. M.

AU - David, G.

AU - Dee, J.

AU - Dietzsch, O.

AU - Drigert, M.

AU - Hall, J. R.

AU - Hemmick, T. K.

AU - Herrmann, N.

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AU - Kwon, Y.

AU - Lacasse, R.

AU - Lukaszew, A.

AU - Li, Q.

AU - Ludlam, T. W.

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AU - Murgatroyd, J. T.

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AU - Panitkin, S.

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AU - Pruneau, C.

AU - Rao, M. N.

AU - Rosati, M.

AU - Da Silva, N. C.

AU - Sedykh, S.

AU - Sonnadara, U.

AU - Stachel, J.

AU - Takagui, E. M.

AU - Voloshin, S.

AU - Wang, G.

AU - Wessels, J. P.

AU - Woody, C. L.

AU - Xu, N.

AU - Zhang, Y.

AU - Zou, C.

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N2 - Experimental results and a detailed analysis are presented of the transverse energy and charged particle azimuthal distributions measured by the E877 Collaboration for different centralities of Au+Au collisions at a beam momentum of 10.8A GeV/c. The anisotropy of these distributions is studied with respect to the reaction plane reconstructed on an event-by-event basis using the transverse energy distribution measured by calorimeters. Results are corrected for the reaction plane resolution. For semicentral events we observe directed flow signals of up to 10%. We observe a stronger anisotropy for slow charged particles. For both the charged particle and transverse energy distributions we observe a small but nonzero elliptic anisotropy with the major axis pointing into the reaction plane. Combining the information on transverse energy and charged particle flow we obtain information on the flow of nucleons and pions. The data are compared to event generators and the need to introduce a mean field or nucleon-nucleon potential is discussed.

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