Femtoscopic measurements in p + Pb collisions at sNN=5.02 TeV with ATLAS at the LHC

Recent measurements in two-particle correlations in p+Pb collisions suggest collective behavior reminiscent of that observed in Pb+Pb. Femtoscopic measurements may provide useful insight on this behavior because they image the spatio-temporal size of the particle emitting region. This proceeding presents identical-pion Hanbury Brown and Twiss (HBT) measurements from ATLAS using one- and three-dimensional correlation functions. Pions are identified using dE/dx measured in the pixel detector. Correlation functions and the resulting HBT radii are shown as a function of pair momentum (kT) and collision centrality.