Disappearance of squeezed back-to-back correlations - A new signal of hadron freeze-out from a supercooled quark gluon plasma

T. Csörgő, Sandra S. Padula

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We briefly discuss four different possible types of transitions from quark to hadronic matter and their characteristic signatures in terms of correlations. We also highlight the effects arising from mass modification of hadrons in hot and dense hadronic matter, as well as their quantum statistical consequences: the appearance of squeezed, quantum, states and the associated experimental signatures, i.e., the back-to-back correlations of particle-antiparticle pairs. We briefly review the theoretical results of these squeezed quanta, generated by inmedium modified masses, starting from the first indication of the existence of surprising particle-antiparticle correlations, and ending by considering the effects of chiral dynamics on these correlation patterns. Nevertheless, a prerequisite for such a signature is the experimental verification of its observability. Therefore, the experimental observation of back-to-back correlations in high energy heavy ion reactions would be a unique signature, proving the existence of in-medium mass modification of hadronic states. On the other hand, their disappearance at some threshold centrality or collision energy would indicate that the hadron formation mechanism would have qualitatively changed: asymptotic hadrons above such a threshold are not formed from medium modified hadrons anymore, but rather by new degrees of freedom characterizing the medium. Furthermore, the disappearance of the squeezed BBC could also serve as a signature of a sudden, non-equilibrium hadronization scenario from a supercooled quark-gluon plasma phase.

Original languageEnglish
Pages (from-to)949-960
Number of pages12
JournalBrazilian Journal of Physics
Volume37
Issue number3 A
Publication statusPublished - Sep 2007

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signatures
quarks
hadrons
antiparticles
chiral dynamics
thresholds
heavy ions
indication
degrees of freedom
collisions
energy

Keywords

  • Correlations
  • Femtoscopy
  • Particle-antiparticle pairs
  • Quantum optics
  • Squeezed coherent states

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Disappearance of squeezed back-to-back correlations - A new signal of hadron freeze-out from a supercooled quark gluon plasma. / Csörgő, T.; Padula, Sandra S.

In: Brazilian Journal of Physics, Vol. 37, No. 3 A, 09.2007, p. 949-960.

Research output: Contribution to journalArticle

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