Back-to-back correlations of boson-antiboson pairs for anisotropic expanding sources

Abstract

In the hot and dense hadronic sources formed in high energy heavy ion collisions, the particle interactions in medium might lead to a measurable back-to-back correlation (BBC) of boson-antiboson pairs. We calculate the BBC functions of $\varphi \varphi$ and $K^{+}{K}^{-}$ for anisotropic expanding sources. The dependences of the BBC on the particle momentum and source expanding velocity are investigated. The results indicate that the BBC functions increase with the magnitude of particle momentum and exhibit an obvious dependence on the direction of the momentum for the anisotropic sources. As the source expanding velocity decreases, the BBC function decreases when the particle momentum is approximately perpendicular to the source velocity, and the BBC function increases when the particle momentum is approximately parallel to the source velocity.

14 pages, 12 figures, a talk presented at the 2014 Autumn Conference of China Physical Society, Sep. 12-14, 2014, Harbin, China

References in corpus (2)

• Squeezed K^+ K^- correlations in high energy heavy ion collisions
• Relativistic effects on the back-to-back correlation functions of boson-antiboson pairs in high energy heavy ion collisions

Cited by in corpus (4)

• Squeezed back-to-back correlation between bosons and antibosons with different in-medium masses in high-energy heavy-ion collisions
• Predictions for squeezed back-to-back correlations of $\varphi \varphi$ and $K^{+}{K}^{-}$ in high-energy heavy-ion collisions by event-by-event hydrodynamics
• Squeezed back-to-back correlations of bosons with nonzero widths in relativistic heavy-ion collisions
• Squeezed back-to-back correlations of $K^{+}$$K^{-}$ in d+Au collisions at $\sqrt{s_{NN}}=200$ GeV and Au+Au collisions at $\sqrt{s_{NN}}=62.4$ GeV