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Search for particle-antiparticle back-to-back correlations in √s NN GeV Au + Au collisions


A novel type of quantum mechanical correlations, hypothesized in the 1990’s, the (squeezed) back-to-back correlations, was predicted to appear in heavy ion collisions among particle-antiparticle (eg. π+π, K + K , \(p\bar p\)) pairs, if their in-medium masses are different from the vacuum values. Observation of this correlation would provide new insight in the freeze-out dynamics of the created matter. The latest status of the PHENIX measurement, comprising the first measurement of this new effect, is presented.

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Correspondence to M. I. Nagy.

Additional information

Talk at the 2009 Workshop on Particle Correlations and Femtoscopy, CERN, Geneva, October 12–17, 2009.

The article is published in the original.

for the PHENIX Collaboration

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Nagy, M.I. Search for particle-antiparticle back-to-back correlations in √s NN GeV Au + Au collisions. Phys. Part. Nuclei Lett. 8, 1033–1036 (2011).

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  • Nucleus Letter
  • Phenix Experiment
  • Hadronic Medium
  • Quantum Mechanical Correlation
  • Kaon