1110.0121 (The ALICE Collaboration)

Particle-yield modification in jet-like azimuthal di-hadron correlations
in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV    [PDF]

The ALICE Collaboration

The yield of charged particles associated with high-pT trigger particles (8 <
pT < 15 GeV/c) is measured with the ALICE detector in Pb-Pb collisions at
sqrt(s_NN) = 2.76 TeV relative to proton-proton collisions at the same energy.
The conditional per-trigger yields are extracted from the narrow jet-like
correlation peaks in azimuthal di-hadron correlations. In the 5% most central
collisions, we observe that the yield of associated charged particles with
transverse momenta pT > 3 GeV/c on the away-side drops to about 60% of that
observed in pp collisions, while on the near-side a moderate enhancement of
20-30% is found.

View original: http://arxiv.org/abs/1110.0121