Heavy-Quark Diffusion Dynamics in Quark–Gluon Plasma under Strong Magnetic Fields

Hattori, Koichi; Fukushima, Kenji; Yee, Ho‐Ung; Yin, Yi

doi:10.1016/j.nuclphysbps.2017.05.062

Cited by 8 publications

(9 citation statements)

References 18 publications

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“…By taking the ratio of D ⊥ and D k , we already noticed in [28] that charm quarks diffuse much more easily in directions parallel to the magnetic field than in perpendicular directions. This confirms from a strong coupling analysis the results presented in [93,94].…”

Section: The Holographic Charmonium Model In a Magnetic Fieldsupporting

confidence: 90%

“…In [93,94], the transverse and longitudinal momentum diffusion coefficients κ k and κ ⊥ were computed in a modified hard thermal loop expansion (valid for α s eB ≪ T 2 ≪ eB), with as estimate for their relative behavior,…”

Section: Introductionmentioning

confidence: 99%

“…This sizeable anisotropy could be an important ingredient in quantifying the elliptic flow (the out-of-reaction-plane anisotropy in particle production) [95][96][97][98], as explained in [93,94,99]. More light on this could be shed from (hydrodynamic) simulations of the evolution of the quark-gluon plasma, [100], using as input reliable estimates for the transport coefficients as κ k and κ ⊥ .…”

Section: Introductionmentioning

confidence: 99%

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Holographic estimate of heavy quark diffusion in a magnetic field

Dudal

Mertens

2018

Phys. Rev. D

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We study the influence of a background magnetic field on the J=ψ vector meson in a Dirac-Born-Infeldextension of the soft wall model, building upon our earlier work [D. Dudal and T. G. Mertens Phys. Rev. D 91, 086002 (2015)]. In this specific holographic QCD model, we discuss the heavy quark number susceptibility and diffusion constants of charm quarks and their dependence on the magnetic field by either a hydrodynamic expansion or by numerically solving the differential equation. This allows us to determine the response of these transport coefficients to the magnetic field. The effects of the latter are considered both from a direct as indirect (medium) viewpoint. As expected, we find a magnetic field induced anisotropic diffusion, with a stronger diffusion in the longitudinal direction compared to the transversal one. We backup, at least qualitatively, our findings with a hanging string analysis of heavy quark diffusion in a magnetic field. From the quark number susceptibility we can extract an estimate for the effective deconfinement temperature in the heavy quark sector, reporting consistency with the phenomenon of inverse magnetic catalysis.

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Section: The Holographic Charmonium Model In a Magnetic Fieldsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Holographic estimate of heavy quark diffusion in a magnetic field

Dudal

Mertens

2018

Phys. Rev. D

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“…calculating the transport coefficients [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], their values at the temperatures of phenomenological interest are not yet certain.…”

mentioning

confidence: 99%

Magnetic field in expanding quark-gluon plasma

Stewart

Tuchin

2018

Phys. Rev. C

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Intense electromagnetic fields are created in the quark-gluon plasma by the external ultrarelativistic valence charges. The time evolution and the strength of this field are strongly affected by the electrical conductivity of the plasma. Yet, it has recently been observed that the effect of the magnetic field on the plasma flow is small. We compute the effect of plasma flow on magnetic field and demonstrate that it is less than 10%. These observations indicate that the plasma hydrodynamics and the dynamics of electromagnetic field decouple. Thus, it is a very good approximation, on the one hand, to study QGP in the background electromagnetic field generated by external sources and, on the other hand, to investigate the dynamics of magnetic field in the background plasma. We also argue that the wake induced by the magnetic field in plasma is negligible. Disciplines Nuclear | Physics CommentsThis article is published as Stewart, Evan, and Kirill Tuchin. "Magnetic field in expanding quark-gluon plasma." Physical Review C 97, no. 4 (2018) Intense electromagnetic fields are created in the quark-gluon plasma by the external ultrarelativistic valence charges. The time evolution and the strength of this field are strongly affected by the electrical conductivity of the plasma. Yet, it has recently been observed that the effect of the magnetic field on the plasma flow is small. We compute the effect of plasma flow on magnetic field and demonstrate that it is less than 10%. These observations indicate that the plasma hydrodynamics and the dynamics of electromagnetic field decouple. Thus, it is a very good approximation, on the one hand, to study QGP in the background electromagnetic field generated by external sources and, on the other hand, to investigate the dynamics of magnetic field in the background plasma. We also argue that the wake induced by the magnetic field in plasma is negligible.

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“…( 3) and ( 4) which corresponds to the collective excitation of quasipartons. Effects of the magnetic field are entering into the system through the dispersion relations and the Debye screening mass [59].…”

Section: Amentioning

confidence: 99%

Bulk viscosity of a hot QCD medium in a strong magnetic field within the relaxation-time approximation

Kurian

Chandra

2018

Phys. Rev. D

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The bulk viscosity of hot QCD medium has been obtained in the presence of strong magnetic field. The present investigation involves the estimation of the quark damping rate and subsequently the thermal relaxation time for quarks in the presence of magnetic field while realizing the hot QCD medium as an effective Grand-canonical ensemble of effective gluons and quarks-antiquarks. The dominant process in the strong field limit is 1 → 2 (g → qq) which contributes to the bulk viscosity in a most significant way. Further, setting up the linearized transport equation in the framework of an effective kinetic theory with hot QCD medium effects and employing the relaxation time approximation, the bulk viscosity has been estimated in lowest Landau level (LLL) and beyond. The temperature dependence of the ratio of the bulk viscosity to entropy density indicates towards its rising behavior near the transition temperature.

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Heavy-Quark Diffusion Dynamics in Quark–Gluon Plasma under Strong Magnetic Fields

Cited by 8 publications

References 18 publications

Holographic estimate of heavy quark diffusion in a magnetic field

Holographic estimate of heavy quark diffusion in a magnetic field

Magnetic field in expanding quark-gluon plasma

Bulk viscosity of a hot QCD medium in a strong magnetic field within the relaxation-time approximation

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