Suppression of High-p{sub T} Neutral Pion Production in Central Pb+Pb Collisions at {radical}(s{sub NN})=17.3 GeV Relative to p+C and p+Pb Collisions
- University of Panjab, Chandigarh 160014 (India)
- Variable Energy Cyclotron Centre, Calcutta 700064 (India)
- University of Geneva, CH-1211 Geneva 4 (Switzerland)
- RRC Kurchatov Institute, RU-123182 Moscow (Russian Federation)
Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at {radical}(s{sub NN})=17.4 GeV at midrapidity (2.3 < or approx. {eta}{sub lab} < or approx. 3.0) over the range 0.7 < or approx. p{sub T} < or approx. 3.5 GeV/c. The spectra are compared to {pi}{sup 0} spectra measured in Pb+Pb collisions at {radical}(s{sub NN})=17.3 GeV in the same experiment. For a wide range of Pb+Pb centralities (N{sub part} < or approx. 300), the yield of {pi}{sup 0}'s with p{sub T} > or approx. 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{sub coll}), while for central Pb+Pb collisions with N{sub part} > or approx. 350, the {pi}{sup 0} yield is suppressed.
- OSTI ID:
- 21134046
- Journal Information:
- Physical Review Letters, Vol. 100, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.100.242301; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). WA98 Collaboration; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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