Measurement of azimuthal correlations of D mesons with charged particles in pp collisions at √s = 7 TeV and p–Pb collisions at √s_NN = 5.02 TeV

The azimuthal correlations of D mesons with charged particles were measured with the ALICE apparatus in pp collisions at √s = 7 TeV and p–Pb collisions at √s_NN = 5.02 TeV at the Large Hadron Collider. D⁰, D⁺, andD^*+ mesons and their charge conjugates with transverse momentum 3 < p_T < 16 GeV/c and rapidity in the nucleon-nucleon centre-of-mass system | y_cms | < 0.5 (pp collisions) and -0.96< y_cms < 0.04 (p–Pb collisions) were correlated to charged particles with p_T > 0.3 GeV/c. The yield of charged particles in the correlation peak induced by the jet containing the D meson and the peak width are compatible within uncertainties in the two collision systems. The data are described within uncertainties by Monte-Carlo simulations based on PYTHIA, POWHEG, and EPOS 3 event generators.