Neutral pion production at midrapidity in pp and Pb–Pb collisions at √sNN = 2.76 TeV

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Abstract

Invariant yields of neutral pions at midrapidity in the transverse momentum range $$0.6 <{p_\mathrm{T}} <12\,{\mathrm {GeV}}/$$c measured in Pb–Pb collisions at $${\sqrt{s_\mathrm{{NN}}}} =2.76$$ TeV are presented for six centrality classes. The pp reference spectrum was measured in the range $$0.4 <{p_\mathrm{T}} <10\,{\mathrm {GeV}}/$$c at the same center-of-mass energy. The nuclear modification factor, $$R_\mathrm{{AA}}$$, shows a suppression of neutral pions in central Pb–Pb collisions by a factor of up to about $$8{-}10$$ for $$5 \lesssim {p_\mathrm{T}} \lesssim 7\,{\mathrm {GeV}}/$$c. The presented measurements are compared with results at lower center-of-mass energies and with theoretical calculations.
Original language English 1-20 20 European Physical Journal C 74 10 https://doi.org/10.1140/epjc/s10052-014-3108-8 Published - 2014

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