J/ψ-hadron correlations at midrapidity in pp collisions at √s=13 TeV

Abstract

We report on the measurement of inclusive, non-prompt, and prompt J/psi-hadron correlations by the ALICE Collaboration at the CERN Large Hadron Collider in pp collisions at a center-of-mass energy of 13 TeV. The correlations are studied at midrapidity (vertical bar y vertical bar < 0.9) in the transverse momentum ranges p(T) < 40 GeV/c for the J/psi and 0.15 < p(T) < 10 GeV/c and vertical bar eta vertical bar < 0.9 for the associated hadrons. The measurement is based on minimum bias and high multiplicity data samples corresponding to integrated luminosities of L-int = 34 nb(-1) and L-int = 6.9 pb(-1), respectively. In addition, two more data samples are employed, requiring, on top of the minimum bias condition, a threshold on the tower energy of E = 4 and 9 GeV in the ALICE electromagnetic calorimeters, which correspond to integrated luminosities of L-int = 0.9 pb(-1) and L-int = 8.4 pb(-1), respectively. The azimuthally integrated near and away side yields of associated charged hadrons per J/psi trigger are presented as a function of the J/psi and associated hadron transverse momentum. The measurements are discussed in comparison to PYTHIA calculations.