New phenomenological model for hadron production in high energy particle collisions

Bylinkin, Aleksandr; Rostovtsev, A.

doi:10.22323/1.180.0040

Cited by 5 publications

(10 citation statements)

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“…(165) allows to estimate the initial energy density, which apparently is related to experimental quantities, like dE/dy and dN ch /dy. The dependence on other quantities is also possible [208,209]. A recent estimation for the quantity ǫ 0 τ at various center-of-mass energies is given in right panel of Fig.…”

Section: Particle Abundances and Their Ratiosmentioning

confidence: 93%

Equilibrium statistical–thermal models in high-energy physics

Tawfik

2014

Int. J. Mod. Phys. A

211

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We review some recent highlights from the applications of statistical-thermal models to different experimental measurements and lattice QCD thermodynamics, that have been made during the last decade. We start with a short review of the historical milestones on the path of constructing statistical-thermal models for heavy-ion physics. We discovered that Heinz Koppe formulated in 1948 an almost complete recipe for the statistical-thermal models. In 1950, Enrico Fermi generalized this statistical approach, in which he started with a general cross-section formula and inserted into it simplifying assumptions about the matrix element of the interaction process that likely reflects many features of the high-energy reactions dominated by density in the phase space of final states. In 1964, Hagedorn systematically analysed the high-energy phenomena using all tools of statistical physics and introduced the concept of limiting temperature based on the statistical bootstrap model. It turns to be quite often that many-particle systems can be studied with the help of statistical-thermal methods. The analysis of yield multiplicities in high-energy collisions gives an overwhelming evidence for the chemical equilibrium in the final state. The strange particles might be an exception, as they are suppressed at lower beam energies. However, their relative yields fulfil statistical equilibrium, as well. We review the equilibrium statistical-thermal models for particle production, fluctuations and collective flow in heavy-ion experiments. We also review their reproduction of the lattice QCD thermodynamics at vanishing and finite chemical potential. During the last decade, five conditions have been suggested to describe the universal behavior of the chemical freeze out parameters. The higher order moments of multiplicity have been discussed. They offer deep insights about particle production and to critical fluctuations. Therefore, we use them to describe the freeze out parameters and suggest the location of the QCD critical endpoint. Various extensions have been proposed in order to take into consideration the possible deviations of the ideal hadron gas. We highlight various types of interactions, dissipative properties and location-dependences (spacial rapidity). Furthermore, we review three models combining hadronic with partonic phases; quasi-particle model, linear σ-model with Polyakov-loop potentials and compressible bag model. PACS numbers: 12.40.Ee,24.60.-k,05.70.Fh,12.40.-y Keywords: Statistical models of strong interactions, Statistical physics of nuclear reactions, Phase transition in statistical mechanics and thermodynamics, Models of strong interactions Contents * http://atawfik.net/ † Electronic address: atawfik@cern.ch 65 3. Chiral phase transition 69 4. Confinement-deconfinement phase diagram 72 V. Higher order moments in statistical-thermal models 74 A. Non-normalized higher order moments 74 B. Normalized higher order moments 77 C. Products of higher order moments 78 D. Experimental higher order moments of particle yie...

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Section: Particle Abundances and Their Ratiosmentioning

confidence: 93%

Equilibrium statistical–thermal models in high-energy physics

Tawfik

2014

Int. J. Mod. Phys. A

211

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“…A systematic comparative analysis of the vast volume of available experimental data allows to gain an insight into the hadron production mechanism. In the present paper the production of charged kaons, protons and antiprotons is analyzed within a framework of the approach developed in our previous publication [1].…”

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confidence: 99%

“…In [1] a new parameterization of the spectrum shape of charged pions inclusively produced in the central rapidity region in high energy particle collisions was proposed.…”

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confidence: 99%

Anomalous behavior of pion production in high energy particle collisions

Bylinkin

Rostovtsev

2012

Eur. Phys. J. C

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“…In [9] it was shown that charged particle spectra measured in γγ collisions can be described by the power-law term of (1.1) alone while spectra measured in pp-collisions require a large (≈ 70%) exponential contribution. Qualitatively such behavior was explained in [10]. Therefore, it is expected that at HERA the transition between these two regimes of hadron production dynamics should be visible.…”

Section: Phenomenological Studiesmentioning

confidence: 85%