Heavy quark dynamics in a hot magnetized QCD medium

Kurian, Manu; Das, Santosh K.; Chandra, Vinod

doi:10.1103/physrevd.100.074003

“…And this magnetic field can persist long-lived due to the presence of electrical conductivity of medium [9][10][11]. In the past years, a variety of novel insights of strongly interacting matter induced by strong magnetic background field have sparkled considerable research, such as chiral magnetic effect [8,12,13], the chiral magnetic wave [14,15], inverse magnetic catalysis [16][17][18][19][20][21][22], and the heavy quark transport [23][24][25][26][27][28][29], etc. Thus, investigating the magnetic field-induced phenomenological consequences and the effect of magnetic field on transport properties can provide a comprehensive understanding of the complex QCD matter.…”

Section: Introductionmentioning

confidence: 99%

“…At the strong magnetic field within the LLL approximation, electrical conductivity along the direction of magnetic field in the QGP has been estimated using diagrammatic method [40], perturbative QCD approach [41], and effective quasi-particle model [42]. In the LLL approximation, the effect of magnetic field on other observables, such as viscosities [43][44][45][46][47], heavy quark complex potential [48] diffusion coefficients of heavy quark [23,27], heavy quark collisional energy loss [49], the properties of quarkonium states [50] and jet quenching parameter [51] also have been studied. Furthermore, the effect of hLLs on various transport coefficients has been investigated recently in Refs.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric properties of the (an-)isotropic QGP in magnetic fields

Zhang

¹

,

Kang

²

,

Zhang

³

2021

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The Seebeck effect and the Nernst effect, which reflect the appearance of electric fields along x-axis and along y-axis ($$E_{x}$$ E x and $$E_{y}$$ E y ), respectively, induced by the thermal gradient along x-axis, are studied in the QGP at an external magnetic field along z-axis. We calculate the associated Seebeck coefficient ($$S_{xx}$$ S xx ) and Nernst signal (N) using the relativistic Boltzmann equation under the relaxation time approximation. In an isotropic QGP, the influences of magnetic field (B) and quark chemical potential ($$\mu _{q}$$ μ q ) on these thermoelectric transport coefficients are investigated. In the presence (absence) of weak magnetic field, we find $$S_{xx}$$ S xx for a fixed $$\mu _{q}$$ μ q is negative (positive) in sign, indicating that the dominant carriers for converting heat gradient to electric field are negatively (positively) charged quarks. The absolute value of $$S_{xx}$$ S xx decreases with increasing temperature. Unlike $$S_{xx}$$ S xx , the sign of N is independent of charge carrier type, and its thermal behavior displays a peak structure. In the presence of strong magnetic field, due to the Landau quantization of transverse motion of (anti-)quarks perpendicular to magnetic field, only the longitudinal Seebeck coefficient ($$S_{zz}$$ S zz ) exists. Our results show that the value of $$S_{zz}$$ S zz at a fixed $$\mu _{q}$$ μ q in the lowest Landau level (LLL) approximation always remains positive. Within the effect of high Landau levels, $$S_{zz}$$ S zz exhibits a thermal structure similar to that in the LLL approximation. As the Landau level increases further, $$S_{zz}$$ S zz decreases and even its sign changes from positive to negative. The computations of these thermoelectric transport coefficients are also extended to a medium with momentum-anisotropy induced by initial spatial expansion as well as strong magnetic field.

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“…This is because of the additional terms in Eqs. (8) and (10), which ensure thermodynamic consistency. Using Eqs.…”

Section: Magnetizationmentioning

confidence: 96%

Thermomagnetic properties and Debye screening for magnetized quark-gluon plasma using the extended self-consistent quasiparticle model

Koothottil

¹

,

Bannur

²

2020

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The thermomagnetic behavior of quark-gluon plasma has recently received a great deal of attention. In this work we make use of the extended self-consistent quasiparticle model to study the thermodynamic properties, magnetic response, and screening properties of magnetized (2+1)-flavor quark-gluon plasma (QGP). The system is considered as a noninteracting system of quasiparticles with masses depending on both temperature and magnetic fields. This allows us to obtain the equation of state of the system and other thermodynamic properties such as the speed of sound. We use the extended self-consistent model to obtain the magnetization and show that QGP has a paramagnetic nature. In addition, we study the pressure anisotropy and calculate the transverse pressure. The obtained anisotropic pressure may be used in hydrodynamic studies of magnetized QGP produced in heavy-ion collisions. We then study the total pressure in both directions, taking pure-field contributions into consideration. Finally we examine the screening properties of magnetized QGP in the longitudinal direction by calculating the Debye screening mass. We go on to compare our results for Debye mass with the results from other approaches.

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“…However, since the HQs are moving in real time inside the QGP, understanding and estimating the dynamical properties of HQs are also necessary. In this context, transport coefficients like drag and diffusion of HQ have been estimated in presence of a strong external magnetic field in some of the recent literatures [19,20]. AdS/CFT has also been employed to have an estimation of the drag force of HQ [49].…”

Section: Jhep05(2020)068mentioning

confidence: 99%

“…The existence of such a magnetic field opens up new directions towards the theoretical studies of properties of QGP leading to diverse experimental consequences. The imprint, the magnetic field lays on QGP brings in some of the most important theoretical studies including Chiral Magnetic Effect(CME) [1,7], Chiral Magnetic Wave leading to a charge-dependent elliptic flow [8][9][10][11], transport properties of QGP in magnetic field [12][13][14], quarkonia suppression [15,16], dilepton and photon production [17,18], HQ drag and diffusion coefficients [19,20], jet quenching [21] etc. To what extent the magnetic field embosses its influence on the deconfined medium depends on several salient properties of the HICs at the early stage.…”

Section: Introductionmentioning

confidence: 99%

HQ collisional energy loss in a magnetized medium

Singh

¹

,

Mazumder

²

,

Mishra

³

2020

J. High Energ. Phys.

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We study the effect of the magnetic field on the collisional energy loss of heavy quark (HQ) moving in a magnetized thermal partonic medium. This is investigated in the strong field approximation where the lowest Landau level (LLL) becomes relevant. We work in the limit g √ eB T √ eB which is relevant for heavy ion collisions. Effects of the magnetic field are incorporated through the resummed gluon propagator in which the dominant contribution arises from the quark loop. We also take the approximation √ eB M , M being the HQ mass, so that the HQ is not Landau quantized. It turns out that there are only two types of scatterings that contribute to the energy loss of HQ; the Coulomb scattering of HQ with light quarks/anti-quarks and the t-channel Compton scattering. It is observed that for a given magnetic field, the dominant contribution to the collisional energy loss arises from Compton scattering process i.e., Qg → Qg. On the other hand, of the two processes, the Coulomb scattering i.e., Qq → Qq is more sensitive to the magnetic field. The net collisional energy loss is seen to increase with increase in the magnetic field. For a reasonable strength of the magnetic field, the field dependent contribution to the collisional energy loss is of the same order as to the case without magnetic field which can be important for the jet quenching phenomena in the heavy ion collision experiments.

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Heavy quark dynamics in a hot magnetized QCD medium

Cited by 28 publications

References 129 publications

Thermoelectric properties of the (an-)isotropic QGP in magnetic fields

Thermoelectric properties of the (an-)isotropic QGP in magnetic fields

Thermomagnetic properties and Debye screening for magnetized quark-gluon plasma using the extended self-consistent quasiparticle model

HQ collisional energy loss in a magnetized medium

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