Squeezed K^+ K^- correlations in high energy heavy ion collisions

Abstract

The hot and dense medium formed in high energy heavy ion collisions may modify some hadronic properties. In particular, if hadron masses are shifted in-medium, it was demonstrated that this could lead to back-to-back squeezed correlations (BBC) of particle-antiparticle pairs. Although well-established theoretically, the squeezed correlations have not yet been discovered experimentally. A method has been suggested for the empirical search of this effect, which was previously illustrated for phi-phi pairs. We apply here the formalism and the suggested method to the case of K^+ K^- pairs, since they may be easier to identify experimentally. The time distribution of the emission process plays a crucial role in the survival of the BBC's. We analyze the cases where the emission is supposed to occur suddenly or via a Lorentzian distribution, and compare with the case of a Levy distribution in time. Effects of squeezing on the correlation function of identical particles are also analyzed.

9 pages and 6 figures (figures 2 to 6 contain 4 plots each). Paragraph added to text, figures 2 to 6 revised for improving visualization

References in corpus (11)

• Identified Charged Particle Spectra and Yields in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Squeezed Correlations and Spectra for Mass-Shifted Bosons
• Quantum Statistical Correlations for Slowly Expanding Systems
• New analytic solutions of the non-relativistic hydrodynamical equations
• Back-to-Back Correlations for Finite Expanding Fireballs
• Squeezed Fermions at Relativistic Heavy Ion Colliders
• Searching for squeezed particle-antiparticle correlations in high energy heavy ion collisions
• Disappearance of Squeezed Back-to-Back Correlations - a new signal of hadron freeze-out from a supercooled Quark Gluon Plasma
• Search for Squeezed-Pair Correlations at RHIC
• Phi-Phi Back-to-Back Correlations in Finite Expanding Systems
• Survival of Back-to-Back Correlations for Finite Expanding Fireballs

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• Squeezed back-to-back correlation between bosons and antibosons with different in-medium masses in high-energy heavy-ion collisions
• Are back-to-back particle--antiparticle correlations observable in high energy nuclear collisions?
• Kaonic Hanbury-Brown-Twiss radii at 200 GeV and 5.02 TeV
• Off-equilibrium photon production during the chiral phase transition
• Back-to-back correlations of boson-antiboson pairs for anisotropic expanding sources
• 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