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Suppression of high-p{T} neutral pion production in central Pb+Pb collisions at sqrt[S{NN}]=17.3 GeV relative to p+C and p+Pb collisions |
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| Authors: | 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 Carlén L Chattopadhyay S Decowski M P Delagrange H Donni P Majumdar M R Dutta El Chenawi K Dubey A K Enosawa K Fokin S Frolov V Ganti M S Garpman S Gavrishchuk O Geurts F J M Ghosh T K Glasow R Guskov B Gustafsson H A Gutbrod H H Hrivnacova I Ippolitov M Kalechofsky H Kamermans R Karadjev K Karpio K Kolb B W Kosarev I Koutcheryaev I Kugler A Kulinich P Kurata M Lebedev A Löhner H Luquin L |
| Institution: | University of Panjab, Chandigarh 160014, India. |
| Abstract: | Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at sqrtS{NN}]=17.4 GeV at midrapidity (2.3 less than or approximately equal eta{lab} less than or approximately equal 3.0) over the range 0.7 less than or approximately equal p{T} less than or approximately equal 3.5 GeV/c. The spectra are compared to pi{0} spectra measured in Pb+Pb collisions at sqrtS{NN}]=17.3 GeV in the same experiment. For a wide range of Pb+Pb centralities (N{part} less than or approximately equal 300), the yield of pi{0}'s with p{T} greater than or approximately equal 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 approximately equal 350, the pi{0} yield is suppressed. |
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