Measuring the Size and Dynamics of Heavy Ion Collisions with Femtoscopy

Femtoscopy is a measurement technique used in high energy collisions of hadrons and heavy ions in order to probe their space-time structure and dynamics. It relies on mutual two-particle correlations to extract the size of the region emitting particles. In this paper, we present the theoretical formalism of the method and discuss features observed in the experimental data and their interpretation in hydrodynamic models.