Canonical Strangeness and Distillation Effects in Hadron Production

Abstract

Strangeness canonical ensemble for Maxwell-Boltzmann statistics is reconsidered for excited nuclear systems with non-vanishing net strangeness. A new recurrence relation method is applied to find the partition function. The method is first generalized to the case of quantum strangeness canonical ensemble. Uncertainties in calculation of the K+/pi+ excitation function are discussed. A new scenario based on the strangeness distillation effect is put forward for a possible explanation of anomalous strangeness production observed at the bombarding energy near 30 AGeV. The peaked maximum in the K+/pi+ ratio is considered as a sign of the critical end-point reached in evolution of the system rather than a latent heat jump emerging from the onset of the first order deconfinement phase transition.

arXiv comment20 pages, 2 figures; typos corrected, 2 references added, minor corrections in text and figures

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Cited by in corpus (8)

• Hadron production in central nucleus-nucleus collisions at chemical freeze-out
• Hadron Production in Ultra-relativistic Nuclear Collisions: Quarkyonic Matter and a Triple Point in the Phase Diagram of QCD
• Lattice QCD Constraints on the Nuclear Equation of State
• Equation of State for Hot and Dense Matter: $\sigma$-$\omega$-$\rho$ Model with Scaled Hadron Masses and Couplings
• Theory of Non-Interacting Fermions and Bosons in the Canonical Ensemble
• Masses and decay widths of scalar $D_0$ and $D_{s0}$ mesons in strange hadronic medium
• A Baseline Study of the Event-shape and Multiplicity Dependence of Chemical Freeze-out Parameters in Proton-Proton Collisions at $\sqrt{s}$ = 13 TeV Using PYTHIA8
• Scaled variables and the quark-hadron duality