Λ-Anomaly in the Hadronic Chemical Freeze-out

Sagun, V. V.

doi:10.15407/ujpe59.08.0755

Cited by 29 publications

(109 citation statements)

References 35 publications

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“…The lowest χ 2 /do f value corresponds to following hard core radii of baryons R b =0.365 fm, mesons R m =0.42 fm, pions R π =0.15 fm, kaons R K =0.395 fm and Λ-hyperons R Λ =0.085 fm within χ 2 /do f = 57.099/55 1.038 which is about 9% larger than the χ 2 /do f found earlier in [14] for the MHRGM. Compared to the values found by the MHRGM, one sees that only pionic hard-core radius increased by 50 %, while the hard-core radius of Λ hyperons diminished by 20 %.…”

Section: Hrgm With the Induced Surface Tensioncontrasting

confidence: 52%

“…As one can see from left panel on After fixing the parameter α one can apply the IST EoS to study the properties of the hadron resonance gas and the ones of nuclear matter. The new EoS is essentially more effective compared to the traditional multicomponent Hadron Resonance Gas Model (MHRGM) [11][12][13][14] and traditional Statistical Multifragmentation Model (SMM) [15][16][17][18], since it can be easily used for any number of independent hard-core radii.…”

Section: Model Formulationmentioning

confidence: 99%

“…n tot X = n th X + n decay = n th X + Y n th Y Br(Y → X), where Br(Y → X) is the decay branching ratio of the Y-th hadron into the hadron X (for more details see [14]). In addition, it is supposed for convenience that BR(X → X) = 1.…”

Section: Hrgm With the Induced Surface Tensionmentioning

confidence: 99%

“…Using the value α =1.25 we employed the IST EoS to fit the 111 independent hadronic multiplicity ratios measured in the central nuclear collisions for the center of mass collision energies √ s NN = 2.7, 3.3, 3.8, 4.3, 4.9, 6.3, 7.6, 8.8, 9.2, 12, 17, 62.4, 130 and 200 GeV were taken from Ref. [14]. For the AGS, SPS, RHIC data the γ S parameter was included in the fit.…”

Section: Hrgm With the Induced Surface Tensionmentioning

confidence: 99%

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Nuclear and hadron matter equation of state within the induced surface tension approach

et al. 2017

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Abstract. We present a novel equation of state which is based on the virial expansion for the multicomponent mixtures with hard core repulsion. The suggested equation of state explicitly contains the surface tension which is induced by particle interaction. At high densities such a surface tension vanishes and in this way it switches the excluded volume treatment of hard core repulsion to its eigen volume treatment. The great advantage of the developed model is that the number of equations to be solved is two and it does not depend on the number of independent hard-core radii. Using the suggested equation of state we obtained a high quality fit of the hadron multiplicities measured at AGS, SPS, RHIC and ALICE energies and studied the properties of the nuclear matter phase diagram. It is shown the developed equation of state is softer than the gas of hard spheres and remains causal up to the several normal nuclear densities. Therefore, it could be applied to the neutron star interior modeling.

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Section: Hrgm With the Induced Surface Tensioncontrasting

confidence: 52%

Section: Model Formulationmentioning

confidence: 99%

Section: Hrgm With the Induced Surface Tensionmentioning

confidence: 99%

Section: Hrgm With the Induced Surface Tensionmentioning

confidence: 99%

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Nuclear and hadron matter equation of state within the induced surface tension approach

et al. 2017

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“…Then we compared the obtained results with the ones found by the MHRGM with the hard-core radii of Ref. [6] (radii from UJP hereafter). The best global fit of all hadronic multiplicities was found for the following values of hard-core radii (new radii hereafter) of baryons R b =0.365 fm, mesons R m =0.42 fm, pions R π =0.15 fm, kaons R K =0.395 fm and Λ-hyperons R Λ =0.085 fm with the total χ 2 /do f = 57.099/55 1.038.…”

Section: Hrgm With the Induced Surface Tensionmentioning

confidence: 99%

Effects of Induced Surface Tension in Nuclear and Hadron Matter

et al. 2017

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Abstract. Short range particle repulsion is rather important property of the hadronic and nuclear matter equations of state. We present a novel equation of state which is based on the virial expansion for the multicomponent mixtures with hard-core repulsion. In addition to the hard-core repulsion taken into account by the proper volumes of particles, this equation of state explicitly contains the surface tension which is induced by another part of the hard-core repulsion between particles. At high densities the induced surface tension vanishes and the excluded volume treatment of hard-core repulsion is switched to its proper volume treatment. Possible applications of this equation of state to a description of hadronic multiplicities measured in A+A collisions, to an investigation of the nuclear matter phase diagram properties and to the neutron star interior modeling are discussed.

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