Centrality dependence of longitudinal and transverse baryon distributions in ultrarelativistic nuclear collisions

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. S. Kumar, R. Lacasse & 26 others D. Lissauer, W. J. Llope, T. W. Ludlam, S. McCorkle, R. Majka, S. K. Mark, J. T. Mitchell, M. Muthuswamy, E. O'Brien, C. Pruneau, M. N. Rao, F. Rotondo, N. C. DaSilva, U. Sonnadara, J. Stachel, H. Takai, E. M. Takagui, T. G. Throwe, C. Winter, G. Wang, D. Wolfe, C. L. Woody, N. Xu, Y. Zhang, Z. Zhang, C. Zou

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Inclusive double differential multiplicities d2N/dy dpt and related quantities have been measured for protons and deuterons produced in 14.6A GeV/c Si+Al and Si+Pb collisions using the E814 forward spectrometer at the AGS at BNL. Collision ''centrality'' is determined by measuring Nc, the total charged particle multiplicity in the pseudorapidity range 0.85<η<3.8. For both systems Si + Al and Si + Pb, an increase in the proton rapidity distribution dN/dy at midrapidity and a corresponding decrease at higher rapidities are observed with increasing Nc. For Si+Pb, Boltzmann slope parameters TB increase significantly in the most central collisions. The measured distributions exhibit a centrality dependence even when σ/σgeo10%, where full overlap between the Si and Pb nuclei occurs in a simple geometric picture. The proton rapidity distribution dN/dy is presented for the symmetric system Si+Al over the entire rapididty interval. The total number of protons, which is the integral of this quantity over rapidity, varies with Nc. Results are compared with various model calculations, mostly using the hadronic cascade codes ARC and RQMD. No significant nuclear transparency is observed, indicating that large baryon and energy densities are produced in these collisions.

Original languageEnglish
Pages (from-to)3047-3059
Number of pages13
JournalPhysical Review C
Volume50
Issue number6
DOIs
Publication statusPublished - 1994 Dec 1
Externally publishedYes

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baryons
collisions
protons
deuterons
cascades
charged particles
flux density
spectrometers
slopes
intervals
nuclei

ASJC Scopus subject areas

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

Cite this

Barrette, J., Bellwied, R., Braun-Munzinger, P., Cleland, W. E., Cormier, T. M., David, G., ... Zou, C. (1994). Centrality dependence of longitudinal and transverse baryon distributions in ultrarelativistic nuclear collisions. Physical Review C, 50(6), 3047-3059. https://doi.org/10.1103/PhysRevC.50.3047

Centrality dependence of longitudinal and transverse baryon distributions in ultrarelativistic nuclear collisions. / 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, Byungsik; Jayananda, K.; Kraus, D.; Kumar, B. S.; Lacasse, R.; Lissauer, D.; Llope, W. J.; Ludlam, T. W.; McCorkle, S.; Majka, R.; Mark, S. K.; Mitchell, J. T.; Muthuswamy, M.; O'Brien, E.; Pruneau, C.; Rao, M. N.; Rotondo, F.; DaSilva, N. C.; Sonnadara, U.; Stachel, J.; Takai, H.; Takagui, E. M.; Throwe, T. G.; Winter, C.; Wang, G.; Wolfe, D.; Woody, C. L.; Xu, N.; Zhang, Y.; Zhang, Z.; Zou, C.

In: Physical Review C, Vol. 50, No. 6, 01.12.1994, p. 3047-3059.

Research output: Contribution to journalArticle

Barrette, J, Bellwied, R, Braun-Munzinger, P, Cleland, WE, Cormier, TM, David, G, Dee, J, Diebold, GE, Dietzsch, O, Germani, JV, Gilbert, S, Greene, SV, Hall, JR, Hemmick, TK, Herrmann, N, Hong, B, Jayananda, K, Kraus, D, Kumar, BS, Lacasse, R, Lissauer, D, Llope, WJ, Ludlam, TW, McCorkle, S, Majka, R, Mark, SK, Mitchell, JT, Muthuswamy, M, O'Brien, E, Pruneau, C, Rao, MN, Rotondo, F, DaSilva, NC, Sonnadara, U, Stachel, J, Takai, H, Takagui, EM, Throwe, TG, Winter, C, Wang, G, Wolfe, D, Woody, CL, Xu, N, Zhang, Y, Zhang, Z & Zou, C 1994, 'Centrality dependence of longitudinal and transverse baryon distributions in ultrarelativistic nuclear collisions', Physical Review C, vol. 50, no. 6, pp. 3047-3059. https://doi.org/10.1103/PhysRevC.50.3047
Barrette J, Bellwied R, Braun-Munzinger P, Cleland WE, Cormier TM, David G et al. Centrality dependence of longitudinal and transverse baryon distributions in ultrarelativistic nuclear collisions. Physical Review C. 1994 Dec 1;50(6):3047-3059. https://doi.org/10.1103/PhysRevC.50.3047
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, Byungsik ; Jayananda, K. ; Kraus, D. ; Kumar, B. S. ; Lacasse, R. ; Lissauer, D. ; Llope, W. J. ; Ludlam, T. W. ; McCorkle, S. ; Majka, R. ; Mark, S. K. ; Mitchell, J. T. ; Muthuswamy, M. ; O'Brien, E. ; Pruneau, C. ; Rao, M. N. ; Rotondo, F. ; DaSilva, N. C. ; Sonnadara, U. ; Stachel, J. ; Takai, H. ; Takagui, E. M. ; Throwe, T. G. ; Winter, C. ; Wang, G. ; Wolfe, D. ; Woody, C. L. ; Xu, N. ; Zhang, Y. ; Zhang, Z. ; Zou, C. / Centrality dependence of longitudinal and transverse baryon distributions in ultrarelativistic nuclear collisions. In: Physical Review C. 1994 ; Vol. 50, No. 6. pp. 3047-3059.
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title = "Centrality dependence of longitudinal and transverse baryon distributions in ultrarelativistic nuclear collisions",
abstract = "Inclusive double differential multiplicities d2N/dy dpt and related quantities have been measured for protons and deuterons produced in 14.6A GeV/c Si+Al and Si+Pb collisions using the E814 forward spectrometer at the AGS at BNL. Collision ''centrality'' is determined by measuring Nc, the total charged particle multiplicity in the pseudorapidity range 0.85<η<3.8. For both systems Si + Al and Si + Pb, an increase in the proton rapidity distribution dN/dy at midrapidity and a corresponding decrease at higher rapidities are observed with increasing Nc. For Si+Pb, Boltzmann slope parameters TB increase significantly in the most central collisions. The measured distributions exhibit a centrality dependence even when σ/σgeo10{\%}, where full overlap between the Si and Pb nuclei occurs in a simple geometric picture. The proton rapidity distribution dN/dy is presented for the symmetric system Si+Al over the entire rapididty interval. The total number of protons, which is the integral of this quantity over rapidity, varies with Nc. Results are compared with various model calculations, mostly using the hadronic cascade codes ARC and RQMD. No significant nuclear transparency is observed, indicating that large baryon and energy densities are produced in these collisions.",
author = "J. Barrette and R. Bellwied and P. Braun-Munzinger and Cleland, {W. E.} and Cormier, {T. M.} and G. David and J. Dee and Diebold, {G. E.} and O. Dietzsch and Germani, {J. V.} and S. Gilbert and Greene, {S. V.} and Hall, {J. R.} and Hemmick, {T. K.} and N. Herrmann and Byungsik Hong and K. Jayananda and D. Kraus and Kumar, {B. S.} and R. Lacasse and D. Lissauer and Llope, {W. J.} and Ludlam, {T. W.} and S. McCorkle and R. Majka and Mark, {S. K.} and Mitchell, {J. T.} and M. Muthuswamy and E. O'Brien and C. Pruneau and Rao, {M. N.} and F. Rotondo and DaSilva, {N. C.} and U. Sonnadara and J. Stachel and H. Takai and Takagui, {E. M.} and Throwe, {T. G.} and C. Winter and G. Wang and D. Wolfe and Woody, {C. L.} and N. Xu and Y. Zhang and Z. Zhang and C. Zou",
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T1 - Centrality dependence of longitudinal and transverse baryon distributions in ultrarelativistic nuclear collisions

AU - Barrette, J.

AU - Bellwied, R.

AU - Braun-Munzinger, P.

AU - Cleland, W. E.

AU - Cormier, T. M.

AU - David, G.

AU - Dee, J.

AU - Diebold, G. E.

AU - Dietzsch, O.

AU - Germani, J. V.

AU - Gilbert, S.

AU - Greene, S. V.

AU - Hall, J. R.

AU - Hemmick, T. K.

AU - Herrmann, N.

AU - Hong, Byungsik

AU - Jayananda, K.

AU - Kraus, D.

AU - Kumar, B. S.

AU - Lacasse, R.

AU - Lissauer, D.

AU - Llope, W. J.

AU - Ludlam, T. W.

AU - McCorkle, S.

AU - Majka, R.

AU - Mark, S. K.

AU - Mitchell, J. T.

AU - Muthuswamy, M.

AU - O'Brien, E.

AU - Pruneau, C.

AU - Rao, M. N.

AU - Rotondo, F.

AU - DaSilva, N. C.

AU - Sonnadara, U.

AU - Stachel, J.

AU - Takai, H.

AU - Takagui, E. M.

AU - Throwe, T. G.

AU - Winter, C.

AU - Wang, G.

AU - Wolfe, D.

AU - Woody, C. L.

AU - Xu, N.

AU - Zhang, Y.

AU - Zhang, Z.

AU - Zou, C.

PY - 1994/12/1

Y1 - 1994/12/1

N2 - Inclusive double differential multiplicities d2N/dy dpt and related quantities have been measured for protons and deuterons produced in 14.6A GeV/c Si+Al and Si+Pb collisions using the E814 forward spectrometer at the AGS at BNL. Collision ''centrality'' is determined by measuring Nc, the total charged particle multiplicity in the pseudorapidity range 0.85<η<3.8. For both systems Si + Al and Si + Pb, an increase in the proton rapidity distribution dN/dy at midrapidity and a corresponding decrease at higher rapidities are observed with increasing Nc. For Si+Pb, Boltzmann slope parameters TB increase significantly in the most central collisions. The measured distributions exhibit a centrality dependence even when σ/σgeo10%, where full overlap between the Si and Pb nuclei occurs in a simple geometric picture. The proton rapidity distribution dN/dy is presented for the symmetric system Si+Al over the entire rapididty interval. The total number of protons, which is the integral of this quantity over rapidity, varies with Nc. Results are compared with various model calculations, mostly using the hadronic cascade codes ARC and RQMD. No significant nuclear transparency is observed, indicating that large baryon and energy densities are produced in these collisions.

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