Suppression of high-pT neutral pion production in central Pb+Pb collisions at sNN=17.3GeV 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. Büsching, L. CarlénS. 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. Å 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. Löhner, L. Luquin, D. P. Mahapatra, V. Manko, M. Martin, G. Martínez, 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. Söderström, G. Sood, S. P. Sørensen, P. Stankus, G. Stefanek, P. Steinberg, E. Stenlund, M. Sumbera, T. Svensson, A. Tsvetkov, L. Tykarski, E. C. V. D. Pijll, N. V. Eijndhoven, G. J. V. Nieuwenhuizen, A. Vinogradov, Y. P. Viyogi, A. Vodopianov, S. Vörös, B. Wysłouch, G. R. Young

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Abstract

Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at sNN=17.4GeV at midrapidity (2.3 ηlab 3.0) over the range 0.7 pT 3.5GeV/c. The spectra are compared to π0 spectra measured in Pb+Pb collisions at sNN=17.3GeV in the same experiment. For a wide range of Pb+Pb centralities (Npart 300), the yield of π0's with pT 2GeV/c is larger than or consistent with the p+C or p+Pb yields scaled with the number of nucleon-nucleon collisions (Ncoll), while for central Pb+Pb collisions with Npart 350, the π0 yield is suppressed.

Original languageEnglish (US)
Article number242301
JournalPhysical Review Letters
Volume100
Issue number24
DOIs
StatePublished - Jun 19 2008

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Aggarwal, M. M., Ahammed, Z., Angelis, A. L. S., Antonenko, V., Arefiev, V., Astakhov, V., Avdeitchikov, V., Awes, T. C., Baba, P. V. K. S., Badyal, S. K., Bathe, S., Batiounia, B., Baumann, C., Bernier, T., Bhalla, K. B., Bhatia, V. S., Blume, C., Bucher, D., Büsching, H., ... Young, G. R. (2008). Suppression of high-pT neutral pion production in central Pb+Pb collisions at sNN=17.3GeV relative to p+C and p+Pb collisions. Physical Review Letters, 100(24), [242301]. https://doi.org/10.1103/PhysRevLett.100.242301