arXiv subjects

Bálint Kurgyis

Publications and source records attributed to Bálint Kurgyis.

5 recordsLinked to original sources

arXiv2024

Coulomb Corrections for Bose-Einstein Correlations from One- And Three-Dimensional Lévy-Type Source Functions

In the study of femtoscopic correlations in high-energy physics, besides Bose--Einstein correlations, one has to take final-state interactions into account. Amongst them, Coulomb interactions play a prominent role in the case of charged particles. Recent measurements have shown that in heavy-ion collisions, Bose--Einstein correlations can be best described by Lévy-type sources instead of the more common Gaussian assumption. Furthermore, three-dimensional measurements have indicated that, depending on the choice of frame, a deviation from spherical symmetry observed under the assumption of Gaussian source functions persists in the case of Lévy-type sources. To clarify such three-dimensional Lévy-type correlation measurements, it is thus important to study the effect of Coulomb interactions in the case of non-spherical Lévy sources. We calculated the Coulomb correction factor numerically in the case of such a source function for assorted kinematic domains and parameter values using the Metropolis--Hastings algorithm and compared our results with previous methods to treat Coulomb interactions in the presence of Lévy sources.

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arXiv2019

Three particle Lévy HBT from PHENIX

Bose-Einstein correlations of identical bosons reveal information about the space-time structure of particle emission from the sQGP formed in ultra-relativistic heavy-ion collisions. Previous measurements of two particle correlations have shown that the source can best be described by a symmetric Levy distribution. Here we report on the measurement of three-particle correlations in 0-30 % centrality Au+Au collisions at $\sqrt{s_{_\text{NN}}} = 200$ GeV, and describe them with a Levy type source. This measurement may shed light on hadron creation mechanisms beyond chaotic emission. We measure three particle correlation strength ($λ_3$) as a function of pair transverse momentum. This parameter, combined with two-particle correlation strength $λ_2$ may reveal the level of chaoticity and coherence in particle production.

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arXiv2019

A Particle Emitting Source From an Accelerating, Perturbative Solution of Relativistic Hydrodynamics

The quark gluon plasma is formed in heavy-ion collisions, and it can be described by solutions of relativistic hydrodynamics. In this paper we utilize perturbative hydrodynamics, where we study first order perturbations on top of a known solution. We investigate the perturbations on top of the Hubble flow. From this perturbative solution we can give the form of the particle emitting source and calculate observables of heavy-ion collisions. We describe the source function and the single-particle momentum spectra for a spherically symmetric solution.

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arXiv2018

Observables from a perturbative, accelerating solution of relativistic hydrodynamics

The discovery of the almost perfect fluid like nature of the strongly interacting quark-gluon plasma was one of the most important discoveries of heavy-ion physics in recent decades. The experimental results are well described by hydrodynamical models. Most of these models are numerical simulations, however the analytic solutions are also important in understanding the time evolution of the quark-gluon plasma created in the heavy-ion collisions. Here we present a perturbative, accelerating solution on top of a known solution, the relativistic Hubble flow. We describe the perturbative class of solutions, and calculate a few observables for a selected solution.

hep-th↗

arXiv2018

Three dimensional Lévy HBT results from PHENIX

In heavy-ion collisions we measure the Bose-Einstein correlation functions to map out the femtoscopic homogeneity region of the particle emitting source. Previously, a one dimensional measurement with a Lévy shaped source was done at the PHENIX experiment. In this paper, we present the three dimensional Lévy HBT results of PHENIX and their comparison with the one dimensional results.

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