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Jet-like correlations with neutral pion triggers in pp and central Pb-Pb collisions at 2.76 TeV

The ALICE collaboration
Phys.Lett. B763 (2016) 238-250, 2016

Abstract (data abstract)
We present measurements of two-particle correlations with neutral pion trigger particles of transverse momenta $8 < p_{\mathrm{T}}^{\rm trig} < 16~\mathrm{GeV}/c$ and associated charged particles of $0.5 < p_{\mathrm{T}}^{\rm assoc} < 10~\mathrm{GeV}/c$ versus the azimuthal angle difference $\Delta\varphi$ at midrapidity in pp and central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV with ALICE. The new measurements exploit associated charged hadrons down to $0.5~\mathrm{GeV}/c$, which significantly extends our previous measurement that only used charged hadrons above $3~\mathrm{GeV}/c$. After subtracting the contributions of the flow background, $v_2$ to $v_5$, the per-trigger yields are extracted for $|\Delta\varphi|<0.7$ on the near and for $|\Delta\varphi-\pi| < 1.1$ on the away side. The ratio of per-trigger yields in Pb-Pb to those in pp collisions, $I_{\mathrm{AA}}$, is measured on the near and away side for the $0$--$10$\% most central Pb-Pb collisions.

  • Table 1

    Data from Figure 2

    10.17182/hepdata.75246.v1/t1

    Charged-particle associated yields relative to $\pi^{0}$ trigger particles versus $\Delta\varphi$ in pp collisions at $\sqrt{s_{NN}}$=2.76 TeV. The $\pi^{0}$ trigger momentum...

  • Table 2

    Data from Figure 3

    10.17182/hepdata.75246.v1/t2

    Charged-particle associated yields relative to $\pi^{0}$ trigger particles versus $\Delta\varphi$ in Pb-Pb collisions at $\sqrt{s_{NN}}$=2.76 TeV. The $\pi^{0}$ trigger momentum...

  • Table 3

    Data from Figure 4a

    10.17182/hepdata.75246.v1/t3

    Per-trigger yield modification, $I_{\rm AA}$, on the near side with trigger $\pi^{0}$ particle at $8 < p_{T}^{trig} < 16~GeV/c$ for...

  • Table 4

    Data from Figure 4b

    10.17182/hepdata.75246.v1/t4

    Per-trigger yield modification, $I_{\rm AA}$, on the away side with trigger $\pi^{0}$ particle at $8 < p_{T}^{trig} < 16~GeV/c$ for...

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