Measurement of azimuthal correlations of D mesons and charged particles in pp collisions at \(\sqrt{s}=7\) TeV and p-Pb collisions at \(\sqrt{s_{\rm NN}} = 5.02\) TeV

Abstract

The azimuthal correlations of D mesons and charged particles were measured with the ALICE detector in pp collisions at \(\sqrt{s}=7\) TeV and p-Pb collisions at \(\sqrt{s_{\rm NN}} = 5.02\) TeV at the Large Hadron Collider. D\)^0\), D\)^+\), and D\)^{*+}\) mesons with transverse momentum \(3 < p_{\rm T} < 16\) GeV/\(c\) and rapidity in the nucleon-nucleon centre-of-mass system \(|y_{\rm cms}| < 0.5\) (pp collisions) and \(-0.96 < y_{\rm cms} < 0.04\) (p-Pb collisions) were correlated to charged particles with \(p_{\rm T} > 0.3\) GeV/\(c\), The properties of the correlation peak induced by the jet containing the D meson, described in terms of the yield of charged particles in the peak and peak width, are compatible within uncertainties between the two collision systems, and described by Monte-Carlo simulations based on the PYTHIA and POWHEG event generators.