A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Diffusion processes involving multiple conserved charges : a study from kinetic theory and implications to the fluid-dynamical modeling of heavy ion collisions (2020)

Fotakis, J. A., Greif, M., Greiner, C., Denicol, G. S., & Niemi, H. (2020). Diffusion processes involving multiple conserved charges : a study from kinetic theory and implications to the fluid-dynamical modeling of heavy ion collisions. Physical Review D, 101(7), Article 076007. https://doi.org/10.1103/PhysRevD.101.076007

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Fotakis, Jan A.; Greif, Moritz; Greiner, Carsten; Denicol, Gabriel S.; Niemi, Harri

Lehti tai sarja: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Julkaisuvuosi: 2020

Volyymi: 101

Lehden numero: 7

Artikkelinumero: 076007

Kustantaja: American Physical Society

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/PhysRevD.101.076007

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/68551

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/1912.09103

Tiivistelmä

The bulk nuclear matter produced in heavy ion collisions carries a multitude of conserved quantum numbers: electric charge, baryon number, and strangeness. Therefore, the diffusion processes associated with these conserved charges cannot occur independently and must be described in terms of a set of coupled diffusion equations. This physics is implemented by replacing the traditional diffusion coefficients for each conserved charge by a diffusion coefficient matrix, which quantifies the coupling between the conserved quantum numbers. The diagonal coefficients of this matrix are the usual charge diffusion coefficients, while the off-diagonal entries describe the diffusive coupling of the charge currents. In this paper, we show how to calculate this diffusion coefficient matrix from kinetic theory and provide results for a hadron resonance gas and a gas of partons. We further find that the off-diagonal entries can reach similar magnitudes compared to the diagonal entries. In order to provide some insight on the influence that the coupling between the net charge diffusion currents can have on heavy ion observables, we present first results for the diffusive evolution of a hadronic system in a simple (1+1)D-fluid dynamics approach, and study different configurations of the diffusion matrix.

YSO-asiasanat: hiukkasfysiikka; ydinfysiikka; diffuusio (fysikaaliset ilmiöt)

Vapaat asiasanat: diffusion; relativistic heavy-ion collisions; transport phenomena

Liittyvät organisaatiot

Hankkeet, joissa julkaisu on tehty

OKM-raportointi: Kyllä

VIRTA-lähetysvuosi: 2020

JUFO-taso: 2