Suppression of high-p(T) neutral pion production in central Pb+Pb collisions at root s(NN)=17.3 GeV relative to p+C and p+Pb collisions

M. M. Aggarwal*, Z. Ahammed, A. L. S. Angelis, V. Antonenko, V. Arefiev, V. Astakhov, V. Avdeitchikov, T. C. Awes, P. V. K. S. Baba, S. K. Badyal, S. Bathe, B. Batiounia, C. Baumann, T. Bernier, K. B. Bhalla, V. S. Bhatia, C. Blume, D. Bucher, H. Buesching, L. CarlenS. Chattopadhyay, M. P. Decowski, H. Delagrange, P. Donni, M. R. Dutta Majumdar, K. El Chenawi, A. K. Dubey, K. Enosawa, S. Fokin, V. Frolov, M. S. Ganti, S. Garpman, O. Gavrishchuk, F. J. M. Geurts, T. K. Ghosh, R. Glasow, B. Guskov, H.A. Gustafsson, H. H. Gutbrod, I. Hrivnacova, M. Ippolitov, H. Kalechofsky, R. Kamermans, K. Karadjev, K. Karpio, B. W. Kolb, I. Kosarev, I. Koutcheryaev, A. Kugler, P. Kulinich, M. Kurata, A. Lebedev, H. Loehner, L. Luquin, D. P. Mahapatra, V. Manko, M. Martin, G. Martinez, A. Maximov, Y. Miake, G. C. Mishra, B. Mohanty, M. -J. Mora, D. Morrison, T. Mukhanova, D. S. Mukhopadhyay, H. Naef, B. K. Nandi, S. K. Nayak, T. K. Nayak, A. Nianine, V. Nikitine, S. Nikolaev, P. Nilsson, S. Nishimura, P. Nomokonov, J. Nystrand, A. Oskarsson, I. Otterlund, S. Pavliouk, T. Peitzmann, D. Peressounko, V. Petracek, S. C. Phatak, W. Pinganaud, F. Plasil, M. L. Purschke, J. Rak, M. Rammler, R. Raniwala, S. Raniwala, N. K. Rao, F. Retiere, K. Reygers, G. Roland, L. Rosselet, I. Roufanov, C. Roy, J. M. Rubio, S. S. Sambyal, R. Santo, S. Sato, H. Schlagheck, H. -R. Schmidt, Y. Schutz, G. Shabratova, T. H. Shah, I. Sibiriak, T. Siemiarczuk, D. Silvermyr, B. C. Sinha, N. Slavine, K. Soederstroem, G. Sood, S. P. Sorensen, P. Stankus, G. Stefanek, P. Steinberg, E. Stenlund, M. Sumbera, T. Svensson, Artem Tsvetkov, L. Tykarski, E. C. Von der Pijll, N. V. Eijndhoven, G. J. V. Nieuwenhuizen, A. Vinogradov, Y. P. Viyogi, A. Vodopianov, S. Voeroes, B. Wyslouch, G. R. Young

*Corresponding author for this work

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28 Citations (Scopus)

Abstract

Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at root s(NN) = 17.4 GeV at midrapidity (2.3 less than or similar to eta(lab)less than or similar to 3.0) over the range 0.7 less than or similar to p(T)less than or similar to 3.5 GeV/c. The spectra are compared to pi(0) spectra measured in Pb+Pb collisions at root s(NN) = 17.3 GeV in the same experiment. For a wide range of Pb+Pb centralities (N(part)less than or similar to 300), the yield of pi(0)'s with p(T)greater than or similar to 2 GeV/c is larger than or consistent with the p+C or p+Pb yields scaled with the number of nucleon-nucleon collisions (N(coll)), while for central Pb+Pb collisions with N(part)greater than or similar to 350, the pi(0) yield is suppressed.

Original languageEnglish
Article number242301
Number of pages5
JournalPhysical Review Letters
Volume100
Issue number24
DOIs
Publication statusPublished - 20-Jun-2008

Keywords

  • NUCLEUS-NUCLEUS COLLISIONS
  • QUARK-GLUON PLASMA
  • 158-CENTER-DOT-A GEV
  • COLLABORATION
  • PERSPECTIVE

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