Isolated photon-jet correlations in pp and p-Pb collisions with ALICE at the LHC

The photon-tagged correlation of jets is a promising channel for the study of partonic energy loss in heavy-ion collisions. The energy of the photon is not affected by the quark-gluon plasma (QGP) and thus gives information about the energy of the parton prior to interaction with the QGP. These measurements are made with the aim of benchmarking a similar study in Pb-Pb collisions, as comparisons between measurements in pp, pA, and AA collisions provide an opportunity to study cold and hot nuclear matter effects. The data for these measurements was collected in 2013 from √s_NN = 5 TeV p-Pb collisions and in 2017 from √s = 5 TeV pp collisions, with respective integrated luminosities of 4.6 nb^-1 and 300 nb^-1. A combination of isolation and shower-shape variables is used to reduce the background in the photon sample from fragmentation photons and meson decays. The purity of the isolated photon selection is extracted using a template fit with a data-driven background estimate. The angular correlation and momentum balance of isolated photon-jet pairs is computed for photons with 15 < p_T < 30 GeV/c measured with the ALICE Electromagnetic Calorimeter and jets with p_T > 8 GeV/c reconstructed from tracks using only the ALICE Inner Tracking System.