Chiral kinetic theory in curved spacetime

Liu, Yuchen; Gao, Lan-Lan; Mameda, Kazuya; Huang, Xuguang

doi:10.1103/physrevd.99.085014

Cited by 112 publications

(148 citation statements)

References 67 publications

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“…Obviously, to work out the momentum integrals both particle and antiparticle contributions should be taken into account. Although angular velocity dependence of the chiral current obtained in [27] differs from (15), the results regarding chiral vortical effect are consistent.…”

Section: Modified Kinetic Equation In Curved Spacetimesupporting

confidence: 54%

“…Then the CKE in the absence of electromagnetic fields is obtained. The phase space measure and first time derivatives of phase space variables which we acquire, differ from the ones presented in [27]. In fact, CKT which we acquire is partially in accord with the one established in [16].…”

Section: Introductionsupporting

confidence: 49%

“…for p 0 in terms of p i . By adopting the notation of [27] let us introduce q = (p 1 , p 2 , p 3 ). The mass-shell condition can be solved as…”

Section: D Ckt In the Presence Of Electromagnetic Fieldsmentioning

confidence: 99%

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Some features of semiclassical chiral transport in rotating frames

Dayi

Kilinçarslan

2019

Phys. Rev. D

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Semiclassical chiral kinetic theories in the presence of electromagnetic fields as well as vorticity can be constructed by means of some different relativistic or nonrelativistic approaches. To cover the noninertial features of rotating frames one can start from the modified quantum kinetic equation of Wigner function in Minkowski spacetime. It provides a relativistic chiral transport equation whose nonrelativistic limit yields a consistent three-dimensional kinetic theory which does not depend explicitly on spatial coordinates. Recently a chiral transport equation in curved spacetime has been proposed and its nonrelativistic limit in rotating coordinates was considered in the absence of electromagnetic fields. We show that the modified theory can be extended to curved spacetime. The related particle current density and chiral transport equation for an inertial observer in the rotating frame are derived. A novel three-dimensional chiral kinetic transport equation is established by inspecting the nonrelativistic limit of the curved spacetime approach in the rotating frame for a comoving observer in the presence of electromagnetic fields. It explicitly depends on spatial coordinates. We prove that it is consistent with the chiral anomaly, chiral magnetic and vortical effects.

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Section: Modified Kinetic Equation In Curved Spacetimesupporting

confidence: 54%

Section: Introductionsupporting

confidence: 49%

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Some features of semiclassical chiral transport in rotating frames

Dayi

Kilinçarslan

2019

Phys. Rev. D

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“…So the average spin polarization is proportional to the so-called thermal vorticity (see definition in next section) if the thermal vorticity is small. Another theoretical approach is the Wigner function (WF) formalism [24][25][26][27][28][29][30], which has been revived [31][32][33][34][35][36][37][38][39] to study the chiral magnetic effect (CME) [40][41][42] (for reviews, see, e.g., Ref. [43][44][45][46]) and chiral vortical effect (CVE) [31,[47][48][49][50][51] for massless fermions.…”

Section: Introductionmentioning

confidence: 99%

Local spin polarization in high energy heavy ion collisions

Pang

Huang

et al. 2019

Phys. Rev. Research

Self Cite

107

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We revisit the azimuthal angle dependence of the local spin polarization of hyperons in heavy-ion collisions at 200 GeV in the framework of the (3+1)D viscous hydrodynamic model CLVisc. Two different initial conditions are considered in our simulation: the optical Glauber initial condition without initial orbital angular momentum and the AMPT initial condition with an initial orbital angular momentum. We find that the azimuthal angle dependence of the hyperon polarization strongly depends on the choice of the so-called spin chemical potential Ωµν . With Ωµν chosen to be proportional to the temperature vorticity, our simulation shows qualitatively coincidental results with the recent measurements at RHIC for both the longitudinal and transverse polarization. We argue that such a coincidence may be related to the fact that the temperature vorticity is approximately conserved in the hot quark-gluon matter. *

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“…The results of this analysis are consistent with the hypothesis that the spacetime around these supermassive objects is described by the Kerr geometry. Constraints on the capabilities of X-ray reflection spectroscopy to test the Kerr-nature of astrophysical black holes was considered in [130], via the analysis of two NuSTAR observations of Cygnus X-1 in the soft state. It turns out that the final measurement can strongly depend on the assumption of the intensity profile.…”

Section: Discussion and Final Remarksmentioning

confidence: 99%

Distinguishing Brans–Dicke–Kerr type naked singularities and black holes with their thin disk electromagnetic radiation properties

Harkó

Kovács²

2020

Eur. Phys. J. C

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The possible existence of naked singularities, hypothetical astrophysical objects, characterized by a gravitational singularity without an event horizon is still an open problem in present day astrophysics. From an observational point of view distinguishing between astrophysical black holes and naked singularities also represents a major challenge. One possible way of differentiating naked singularities from black holes is through the comparative study of thin accretion disks properties around these different types of compact objects. In the present paper we continue the comparative investigation of accretion disk properties around axially-symmetric rotating geometries in Brans-Dicke theory in the presence of a massless scalar field. The solution of the field equations contains the Kerr metric as a particular case, and, depending on the numerical values of the model parameter γ, has also solutions corresponding to non-trivial black holes and naked singularities, respectively. Due to the differences in the exterior geometries between black holes and Brans-Dicke-Kerr naked singularities, the thermodynamic and electromagnetic properties of the disks (energy flux, temperature distribution and equilibrium radiation spectrum) are different for these two classes of compact objects, consequently giving clear observational signatures that could discriminate between black holes and naked singularities.

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Chiral kinetic theory in curved spacetime

Cited by 112 publications

References 67 publications

Some features of semiclassical chiral transport in rotating frames

Some features of semiclassical chiral transport in rotating frames

Local spin polarization in high energy heavy ion collisions

Distinguishing Brans–Dicke–Kerr type naked singularities and black holes with their thin disk electromagnetic radiation properties

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