Searching for squeezed particle-antiparticle correlations in high-energy heavy-ion collisions

摘要

Squeezed correlations of particle-antiparticle pairs were predicted to exist if the hadron masses were modifiednin the hot and dense medium formed in high-energy heavy-ion collisions. Although well-established theoretically,nthey have not yet been observed experimentally. We suggest here a clear method to search for such a signal bynanalyzing the squeezed correlation functions in terms of measurable quantities. We illustrate this suggestion fornsimulated φφ pairs at the Relativistic Heavy Ion Collider (RHIC) energies.