Bose-Einstein correlations and determination of fireball dimension in hadron collisions
E. A. Bartnik, Kazimierz Rza̧żewski · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 1978
We investigate assumptions necessary for determination of the interaction region fireball in hadron collisions from recently observed correlations between pions of the same charge. We show, in analogy to quantum optics, that this is possible when the emission from fireball is partially incoherent. This leads to a density matrix for produced pions which embodies several models previously used. A simple formula is derived, relating space-time distribution of the emission region to the experimentally measured like-particle correlations at small momentum difference.