Relativistic effects on the back-to-back correlation functions of   boson-antiboson pairs in high energy heavy ion collisions
  We calculate the back-to-back correlation (BBC) functions of relativistic boson-antiboson pairs in high energy heavy ion collisions using the Monte Carlo method. The relativistic effects on the BBC functions of $\phi\,\phi$ and $K^+K^-$ pairs are investigated. The investigations indicate that the relativistic effects on the BBC functions of $K^+K^-$ pairs with large momenta are significant, and the effect is sensitive to the particle freeze-out temperature. 
Yong Zhang, Jing Yang, Wei-Ning Zhang
nucl-th