Phenomenology of strangeness production at high energies

Tawfik, A.; Yassin, Hayam; Elyazeed, Eman R. Abo; Maher, Muhammad; Diab, Abdel Magied; Wahab, Magda Abdel; Dahab, Eiman Abou El

doi:10.1209/0295-5075/116/62001

Cited by 5 publications

(34 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different from Ref. [1], the present analysis shows a rapid suppression in the light-and strange-quark simultaneous production, at AGS energies, Fig. 1.…”

Section: Approachcontrasting

confidence: 85%

“…The success reported in Ref. [1], where γ q was ad hoc assumed to remain in equilibrium while merely γ q = 1, in reproducing various particle ratios encourages us to assume full chemical nonequilibrium, i.e. γ s = 1 and γ q = 1.…”

Section: The Characteristicmentioning

confidence: 99%

“…We shall analyze how the varying coefficients/parameters contribute to the various energy-dependencies? While the implications of the previous parameterization were limited to reproduction of various particle ratios [1], the present ones shall be also applied in reproducing various particle ratios including K + /π + , K − /π − , Λ/π − ,Λ/π − , Ξ + /π + , and Ω/π − . Other implications shall be presented, as well.…”

Section: Approachmentioning

confidence: 99%

“…Ref. [1]. The chemical phase-space occupancy factors (γ q,s ) determine the number of produced pairs of a certain quark flavor.…”

Section: Introductionmentioning

confidence: 99%

“…Nonequilibrium chemical phase-space occupancy for the strange quark γ s = 1 was introduced in order to characterize the possible strangeness enhancement [3], which in turn was assumed to be resulted in from the formation of the quark-gluon plasma (QGP), the new state-of-matter discovered at RHIC energies [4] and later on confirmed though systematic jet-quenching analysis at LHC energies [5,6]. Here, we assume that both chemical phase-space occupancy factors γ q,s = 1 [1,7,8].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Phenomenology of light- and strange-quark simultaneous production at high energies

Tawfik

Yassin

Elyazeed

2017

Phys. Part. Nuclei Lett.

Self Cite

View full text Add to dashboard Cite

This letter presents an extension of EPL116(2017)62001 to light-and strange-quark nonequilibrium chemical phase-space occupancy factors (γ q,s ). The resulting damped trigonometric functionalities relating γ q,s to the nucleon-nucleon center-of-mass energies ( √ s N N ) looks very similar except different coefficients. The phenomenology of the resulting γ q,s ( √ s N N ) describes a rapid decrease at √ s N N < ∼ 7 GeV followed by a faster increase up to ∼ 20 GeV. Then, both γ q,s become nonsensitive to √ s N N .Although these differ from γ s ( √ s N N ) obtained at γ q ( √ s N N ) = 1, various particle ratios including K + /π + , K − /π − , Λ/π − ,Λ/π − , Ξ + /π + , and Ω/π − , can well be reproduced, as well. We conclude that γ q,s ( √ s N N ) should be instead determined from fits of various particle yields and ratios but not merely from fits to the particle ratio K + /π + .

show abstract

“…Different from Ref. [1], the present analysis shows a rapid suppression in the light-and strange-quark simultaneous production, at AGS energies, Fig. 1.…”

Section: Approachcontrasting

confidence: 85%

Section: The Characteristicmentioning

confidence: 99%

Section: Approachmentioning

confidence: 99%

“…Ref. [1]. The chemical phase-space occupancy factors (γ q,s ) determine the number of produced pairs of a certain quark flavor.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Phenomenology of light- and strange-quark simultaneous production at high energies

Tawfik

Yassin

Elyazeed

2017

Phys. Part. Nuclei Lett.

Self Cite

View full text Add to dashboard Cite

show abstract

Bulk properties of the medium produced in relativistic heavy-ion collisions from the beam energy scan program

Adamczyk¹,

Adkins²,

Agakishiev³

et al. 2017

Phys. Rev. C

509

483

View full text Add to dashboard Cite

We present measurements of bulk properties of the matter produced in Au+Au collisions at √ sNN = 7.7, 11.5, 19.6, 27, and 39 GeV using identified hadrons (π ± , K ± , p andp) from the STAR experiment in the Beam Energy Scan (BES) Program at the Relativistic Heavy Ion Collider (RHIC). Midrapidity (|y| <0.1) results for multiplicity densities dN/dy, average transverse momenta pT and particle ratios are presented. The chemical and kinetic freeze-out dynamics at these energies are discussed and presented as a function of collision centrality and energy. These results constitute the systematic measurements of bulk properties of matter formed in heavy-ion collisions over a broad range of energy (or baryon chemical potential) at RHIC.

show abstract

An appropriate statistical approach for non-equilibrium particle production

Tawfik,

Elyazeed,

Alshehri

et al. 2024

Mod. Phys. Lett. B

View full text Add to dashboard Cite

The incapability of thermal models to accurately reproduce the horn-like structure of the Kaon-to-pion ratio measured at AGS, SPS, and low RHIC energies, as well as confirmed in the beam energy scan program, has long been a persistent problem. This issue is believed to have arisen due to the inappropriate application of statistics, particularly the extensive additive Boltzmann–Gibbs (BG) statistics. The assumption that the analysis of particle production, a dynamic non-equilibrium process, should be primarily conducted using extensive BG or non-extensive Tsallis statistics, has proven to be an unsuccessful approach that has been followed for several decades. By employing generic (non)extensive statistics, two equivalence classes [Formula: see text] emerge, thereby undermining the validity of any ad hoc assumption. Consequently, the degree of (non)extensivity exhibited by the statistical ensemble is determined by its own characteristics. This encompasses both extensive BG statistics, characterized by [Formula: see text], and non-extensive Tsallis statistics, characterized by [Formula: see text]. The energy dependence of light-, [Formula: see text], and strange-quark occupation factor, [Formula: see text], suggests that the produced particles are most appropriately described as a non-equilibrium ensemble. This is evidenced by a remarkable non-monotonic behavior observed in the [Formula: see text] horn, for instance. On the other hand, the resulting equivalence classes [Formula: see text] are associated with a generic non-extensivity related to extended exponential and Lambert-[Formula: see text] exponentially generating distribution function, which evidently arise from free, short- and long-range correlations. The incorporation of generic non-extensive statistics into the hadron resonance gas model yields an impressive ability to rightfully reproduce the non-monotonic [Formula: see text] ratio.

show abstract

Phenomenology of strangeness production at high energies

Cited by 5 publications

References 48 publications

Phenomenology of light- and strange-quark simultaneous production at high energies

Phenomenology of light- and strange-quark simultaneous production at high energies

Bulk properties of the medium produced in relativistic heavy-ion collisions from the beam energy scan program

An appropriate statistical approach for non-equilibrium particle production

Contact Info

Product

Resources

About