A rotation/magnetism analogy for the quark–gluon plasma

McInnes, Brett

doi:10.1016/j.nuclphysb.2016.08.001

Cited by 35 publications

(20 citation statements)

References 114 publications

(205 reference statements)

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“…It may be preferable to turn attention to the exciting prospects opened up by the various beam energy scan experiments currently under way or in preparation [62][63][64][65][66][67], where the QGP is much more likely to be strongly coupled and where, as was explained in [9], there is no difficulty in satisfying the consistency condition even in the presence of large magnetic fields (because the non-zero baryonic chemical potential tends to counteract the tendency of the magnetic field to violate it). A holographic approach may well prove fruitful in that region of the quark matter phase diagram: see for example [68,69] and references therein.…”

Section: Resultsmentioning

confidence: 99%

On the existence of a holographic description of the LHC quark–gluon plasmas

McInnes

Ong

2017

Nuclear Physics B

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Peripheral collisions of heavy ions can give rise to extremely intense magnetic fields. It has been suggested that these fields might invalidate the holographic description of the corresponding quark-gluon plasmas, assuming that these can be modelled by strongly coupled field theories. In the case of the plasmas produced in collisions at the RHIC facility (including in the beam energy scans), it is known how to deal with this problem: one has to take into account the large angular momenta generated in these plasmas, and the effects of the baryonic chemical potential. But this does not work for the plasmas produced in peripheral collisions at the LHC. However, these results neglect some (less significant) aspects of bulk physics; could it be that the problem is resolved by taking into account these lower-order effects? Here we use a bulk dilatonic field (fully compatible with boundary data, as well as with the asymptotically AdS character of the bulk geometry) as a model of these effects, and show that this is unlikely to be the solution. Thus, the existence of a consistent holographic description of the most extreme LHC plasmas remains open to question.

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Section: Resultsmentioning

confidence: 99%

On the existence of a holographic description of the LHC quark–gluon plasmas

McInnes

Ong

2017

Nuclear Physics B

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“…However, before finishing this section we would like to make a comment on possibility, in the present relativistic context, of existence of a relation between rotation and (effective) magnetic field which was discussed in the literature recently in refs. [23,28].…”

Section: Rotation Vs External Magnetic Fieldmentioning

confidence: 99%

“…[35]). However, at finite temperature the overall influence of global rotation on the chiral transition is similar to the one of the inverse magnetic catalysis [35]: the critical temperature of the chiral transition is a decreasing function of both temperature and angular frequency [28]. 2 A qualitatively similar effect on the critical temperature may also be produced by a finite chemical potential [23], so that the analogy of the rotation and magnetic field at finite temperature is not clear.…”

Section: Jhep01(2017)136mentioning

confidence: 99%

“…[16][17][18][19][20][21] and the system of interacting fermions has recently been studied both in unbounded [23,24] and bounded [25] geometries in effective field-theoretical models, as well as in the holographic approaches [26][27][28]. Properties of rotating strongly interacting matter were also probed in lattice simulations of euclidean QCD [29].…”

Section: Introductionmentioning

confidence: 99%

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Interacting fermions in rotation: chiral symmetry restoration, moment of inertia and thermodynamics

Chernodub

Gongyo

2017

J. High Energ. Phys.

115

110

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We study rotating fermionic matter at finite temperature in the framework of the Nambu-Jona-Lasinio model. In order to respect causality the rigidly rotating system must be bound by a cylindrical boundary with appropriate boundary conditions that confine the fermions inside the cylinder. We show the finite geometry with the MIT boundary conditions affects strongly the phase structure of the model leading to three distinct regions characterized by explicitly broken (gapped), partially restored (nearly gapless) and spontaneously broken (gapped) phases at, respectively, small, moderate and large radius of the cylinder. The presence of the boundary leads to specific steplike irregularities of the chiral condensate as functions of coupling constant, temperature and angular frequency. These steplike features have the same nature as the Shubnikov-de Haas oscillations with the crucial difference that they occur in the absence of both external magnetic field and Fermi surface. At finite temperature the rotation leads to restoration of spontaneously broken chiral symmetry while the vacuum at zero temperature is insensitive to rotation ("cold vacuum cannot rotate"). As the temperature increases the critical angular frequency decreases and the transition becomes softer. A phase diagram in angular frequency-temperature plane is presented. We also show that at fixed temperature the fermion matter in the chirally restored (gapless) phase has a higher moment of inertia compared to the one in the chirally broken (gapped) phase.

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“…Finally, the possibility of a change in the quark-hadron phase transition line in the QCD phase diagram under the combined influence of external magnetic field and local vortices was explored in Ref. [22]; we refer the reader to the recent reviews [23][24][25][26][27], where more details can be found.…”

Section: Introductionmentioning

confidence: 99%

Effect of intense magnetic fields on reduced-magnetohydrodynamics evolution in sNN=200 GeV Au + Au collisions

Roy

Rezzolla

et al. 2017

Phys. Rev. C

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We investigate the effect of large magnetic fields on the 2 + 1 dimensional reduced-magnetohydrodynamical expansion of hot and dense nuclear matter produced in √ sNN = 200 GeV Au+Au collisions. For the sake of simplicity, we consider the case where the magnetic field points in the direction perpendicular to the reaction plane. We also consider this field to be external, with energy density parametrized as a two-dimensional Gaussian. The width of the Gaussian along the directions orthogonal to the beam axis varies with the centrality of the collision. The dependence of the magnetic field on proper time (τ ) for the case of zero electrical conductivity of the QGP is parametrized following Ref.[1], and for finite electrical conductivity following Ref. [2]. We solve the equations of motion of ideal hydrodynamics for such an external magnetic field. For collisions with non-zero impact parameter we observe considerable changes in the evolution of the momentum eccentricities of the fireball when comparing the case when the magnetic field decays in a conducting QGP medium and when no magnetic field is present. The elliptic-flow coefficient v2 of π − is shown to increase in the presence of an external magnetic field and the increment in v2 is found to depend on the evolution and the initial magnitude of the magnetic field. arXiv:1706.05326v3 [nucl-th]

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A rotation/magnetism analogy for the quark–gluon plasma

Cited by 35 publications

References 114 publications

On the existence of a holographic description of the LHC quark–gluon plasmas

On the existence of a holographic description of the LHC quark–gluon plasmas

Interacting fermions in rotation: chiral symmetry restoration, moment of inertia and thermodynamics

Effect of intense magnetic fields on reduced-magnetohydrodynamics evolution in sNN=200 GeV Au + Au collisions

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