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Suppression of High-pT Neutral Pions in Central Pb+Pb Collisions at sqrt{s_NN} = 17.3 GeV
Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at sqrt{s_NN} = 17.4 GeV at mid-rapidity (2.3 <eta < 3.0) over the range 0.7 <p_T < 3.5 GeV/c. The spectra are compared to neutral pion spectra measured in Pb+Pb collisions at the same energy in the same ex...
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Lenguaje: | eng |
Publicado: |
2007
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.100.242301 http://cds.cern.ch/record/1052247 |
Sumario: | Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at sqrt{s_NN} = 17.4 GeV at mid-rapidity (2.3 <eta < 3.0) over the range 0.7 <p_T < 3.5 GeV/c. The spectra are compared to neutral pion spectra measured in Pb+Pb collisions at the same energy in the same experiment. For a wide range of Pb+Pb centralities (N_{part} < 300) the yield of pi^0's with p_T > 2 GeV/c is consistent with the p+C or p+Pb yields scaled with the number of inelastic nucleon-nucleon collisions, while for central Pb+Pb collisions with N_{part} > 300 the pion yield is suppressed. |
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