EPJ

2022 Impact factor 4.4
EPJ C - Particles and Fields
Particles and Fields


Eur. Phys. J. C 18, 651-663
DOI: 10.1007/s100520100578

Scaling of particle and transverse energy production in 208Pb + 208Pb collisions at 158$\cdot A$ GeV

The WA98 Collaboration M.M. Aggarwal1, A. Agnihotri2, Z. Ahammed3, A.L.S. Angelis4, V. Antonenko5, V. Arefiev6, V. Astakhov6, V. Avdeitchikov6, T.C. Awes7, P.V.K.S. Baba8, S.K. Badyal8, A. Baldine6, L. Barabach6, C. Barlag9, S. Bathe9, B. Batiounia6, T. Bernier10, K.B. Bhalla2, V.S. Bhatia1, C. Blume9, E.-M. Bohne9, Z.K. Böröcz9, D. Bucher9, A. Buijs11, H. Büsching9, L. Carlen12, V. Chalyshev6, S. Chattopadhyay3, R. Cherbatchev5, T. Chujo13, A. Claussen9, A.C. Das3, M.P. Decowski14, H. Delagrange10, V. Djordjadze6, P. Donni4, I. Doubovik5, S. Dutt8, M.R. Dutta Majumdar3, K. El Chenawi12, S. Eliseev15, K. Enosawa13, P. Foka4, S. Fokin5, V. Frolov6, M.S. Ganti3, S. Garpman12, O. Gavrishchuk6, F.J.M. Geurts11, T.K. Ghosh16, R. Glasow9, S. K.Gupta2, B. Guskov6, H. Å.Gustafsson12, H. H.Gutbrod10, R. Higuchi13, I. Hrivnacova15, M. Ippolitov5, H. Kalechofsky4, R. Kamermans11, K.-H. Kampert9, K. Karadjev5, K. Karpio17, S. Kato13, S. Kees9, H. Kim7, B. W. Kolb18, I. Kosarev6, I. Koutcheryaev5, T. Krümpel9, A. Kugler15, P. Kulinich14, M. Kurata13, K. Kurita13, N. Kuzmin6, I. Langbein18, A. Lebedev5, Y.Y. Lee18, H. Löhner16, L. Luquin10, D.P. Mahapatra19, V. Manko5, M. Martin4, G. Martínez10, A. Maximov6, R. Mehdiyev6, G. Mgebrichvili5, Y. Miake13, D. Mikhalev6, Md.F. Mir8, G.C. Mishra19, Y. Miyamoto13, B. Mohanty19, M. J. Mora10, D. Morrison20, D. S. Mukhopadhyay3, V. Myalkovski6, H. Naef4, B. K. Nandi19, S. K. Nayak10, T. K. Nayak3, S. Neumaier18, A. Nianine5, V. Nikitine6, S. Nikolaev6, P. Nilsson12, S. Nishimura13, P. Nomokonov6, J. Nystrand12, F.E. Obenshain20, A. Oskarsson12, I. Otterlund12, M. Pachr15, A. Parfenov6, S. Pavliouk6, T. Peitzmann9, V. Petracek15, F. Plasil7, W. Pinganaud10, M.L. Purschke18, B. Raeven11, J. Rak15, R. Raniwala2, S. Raniwala2, V.S. Ramamurthy19, N.K. Rao8, F. Retiere10, K. Reygers9, G. Roland14, L. Rosselet4, I. Roufanov6, C. Roy10, J.M. Rubio4, H. Sako13, S.S. Sambyal8, R. Santo9, S. Sato13, H. Schlagheck9, H.-R. Schmidt18, Y. Schutz10, G. Shabratova6, T.H. Shah8, I. Sibiriak5, T. Siemiarczuk17, D. Silvermyr12, B.C. Sinha3, N. Slavine6, K. Söderström12, N. Solomey4, S.P. Sørensen7, 20, P. Stankus7, G. Stefanek17, P. Steinberg14, E. Stenlund12, D. Stüken9, M. Sumbera15, T. Svensson12, M.D. Trivedi3, A. Tsvetkov5, L. Tykarski17, J. Urbahn18, E.C.v.d. Pijll11, N.v. Eijndhoven11, G.J.v. Nieuwenhuizen14, A. Vinogradov5, Y.P. Viyogi3, A. Vodopianov6, S. Vörös4, B. Wyslouch14, K. Yagi13, Y. Yokota13 and G.R. Young7

1  University of Panjab, Chandigarh 160014, India
2  University of Rajasthan, Jaipur 302004, Rajasthan, India
3  Variable Energy Cyclotron Centre, Calcutta 700 064, India
4  University of Geneva, 1211 Geneva 4, Switzerland
5  RRC "Kurchatov Institute", 123182 Moscow, Russia
6  Joint Institute for Nuclear Research, 141980 Dubna, Russia
7  Oak Ridge National Laboratory, Oak Ridge, TN 37831-6372, USA
8  University of Jammu, Jammu 180001, India
9  University of Münster, 48149 Münster, Germany
10  SUBATECH, Ecole des Mines, Nantes, France
11  Universiteit Utrecht/NIKHEF, 3508 TA Utrecht, The Netherlands
12  Lund University, 221 00 Lund, Sweden
13  University of Tsukuba, Ibaraki 305, Japan
14  MIT Cambridge, MA 02139, USA
15  Nuclear Physics Institute, 250 68 Rez, Czech Rep.
16  KVI, University of Groningen, 9747 AA Groningen, The Netherlands
17  Institute for Nuclear Studies, 00-681 Warsaw, Poland
18  Gesellschaft für Schwerionenforschung (GSI), 64220 Darmstadt, Germany
19  Institute of Physics, 751-005 Bhubaneswar, India
20  University of Tennessee, Knoxville, TN 37966, USA

(Received: 8 August 2000 / Revised version: 5 December 2000 / Published online: 5 February 2001 -© Springer-Verlag 2001)

Abstract
Transverse energy, charged particle pseudorapidity distributions and photon transverse momentum spectra have been studied as a function of the number of participants (Npart) and the number of binary nucleon-nucleon collisions (Ncoll) in 158$\cdot A$ GeV Pb+Pb collisions over a wide impact parameter range. A scaling of the transverse energy pseudorapidity density at midrapidity as $\sim N_{part}^{1.08 \pm 0.06}$ and $\sim N_{coll}^{0.83 \pm 0.05}$ is observed. For the charged particle pseudorapidity density at midrapidity we find a scaling as $\sim N_{part}^{1.07 \pm 0.04}$ and $\sim N_{coll}^{0.82 \pm 0.03}$. This faster than linear scaling with Npart indicates a violation of the naive Wounded Nucleon Model.



© Società Italiana di Fisica, Springer-Verlag 2001

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