Momentum fluctuations of heavy quarks in the gauge-string duality

Gubser, Steven S.

doi:10.1016/j.nuclphysb.2007.09.017

Cited by 201 publications

(371 citation statements)

References 55 publications

(151 reference statements)

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“…[45,46], but this goes beyond the scope of the present analysis. We also compare our results, both for the transport coefficients and for the Langevin dynamics of the heavy quarks, with the findings provided by the AdS/CFT correspondence, which, for the N = 4 SYM theory, predicts: [13,14,15] …”

Section: Numerical Resultssupporting

confidence: 55%

Transport properties and Langevin dynamics of heavy quarks and quarkonia in the Quark Gluon Plasma

Beraudo¹,

Pace²,

Alberico³

et al. 2009

Nuclear Physics A

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Quark Gluon Plasma transport coefficients for heavy quarks and QQ pairs are computed through an extension of the results obtained for a hot QED plasma by describing the heavy-quark propagation in the eikonal approximation and by weighting the gauge field configurations with the Hard Thermal Loop effective action. It is shown that such a model allows to correctly reproduce, at leading logarithmic accuracy, the results obtained by other independent approaches. The results are then inserted into a relativistic Langevin equation allowing to follow the evolution of the heavy-quark momentum spectra. Our numerical findings are also compared with the ones obtained in a strongly-coupled scenario, namely with the transport coefficients predicted (though with some limitations and ambiguities) by the AdS/CFT correspondence.

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Section: Numerical Resultssupporting

confidence: 55%

Transport properties and Langevin dynamics of heavy quarks and quarkonia in the Quark Gluon Plasma

Beraudo¹,

Pace²,

Alberico³

et al. 2009

Nuclear Physics A

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“…In the strongly coupled plasma of N = 4 SYM theory, transverse momentum broadening has been calculated holographically for both heavy quarks [116,121,122] and massless quarks [115,132]. Although there is no notion of scattering centers and no notion of multiple discrete transfers of momentum in the strongly coupled limit, both heavy and massless quarks pick up transverse momentum as they propagate through the hot strongly coupled liquid and the resulting transverse momentum distribution is Gaussian with a width JHEP03(2017)135…”

Section: Transverse Kicks and Jet Broadeningmentioning

confidence: 99%

Angular structure of jet quenching within a hybrid strong/weak coupling model

Casalderrey-Solana

Gulhan

Milhano

et al. 2017

J. High Energ. Phys.

123

145

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Within the context of a hybrid strong/weak coupling model of jet quenching, we study the modification of the angular distribution of the energy within jets in heavy ion collisions, as partons within jet showers lose energy and get kicked as they traverse the strongly coupled plasma produced in the collision. To describe the dynamics transverse to the jet axis, we add the effects of transverse momentum broadening into our hybrid construction, introducing a parameter K ≡q/T 3 that governs its magnitude. We show that, because of the quenching of the energy of partons within a jet, even when K = 0 the jets that survive with some specified energy in the final state are narrower than jets with that energy in proton-proton collisions. For this reason, many standard observables are rather insensitive to K. We propose a new differential jet shape ratio observable in which the effects of transverse momentum broadening are apparent. We also analyze the response of the medium to the passage of the jet through it, noting that the momentum

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“…[10,11] for N = 4 Super Yang-Mills theory, and was generalized to non-conformal theories in Ref. [17].…”

Section: 1q From Transverse Momentum Diffusionmentioning

confidence: 99%

Jet quenching parameter of the quark-gluon plasma in a strong magnetic field: Perturbative QCD and AdS/CFT correspondence

Mamo

Yee

2016

Phys. Rev. D

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We compute the jet quenching parameterq of QCD plasma in the presence of strong magnetic field in both weakly and strongly coupled regimes. In weakly coupled regime, we computeq in perturbative QCD at complete leading order (that is, leading log as well as the constant under the log) in QCD coupling constant α s , assuming the hierarchy of scales α s eB T 2 eB. We consider two cases of jet orientations with respect to the magnetic field: 1) the case of jet moving parallel to the magnetic field, 2) the case jet moving perpendicular to the magnetic field. In the former case, we findq ∼ α 2 s (eB)T log(1/α s ), while in the latter we havê q ∼ α 2 s (eB)T log(T 2 /α s eB). In both cases, this leading order result arises from the scatterings with thermally populated lowest Landau level quarks. In strongly coupled regime described by AdS/CFT correspondence, we findq ∼ √ λ(eB)T or q ∼ √ λ √ eBT 2 in the same hierarchy of T 2 eB depending on whether the jet is moving parallel or perpendicular to the magnetic field, respectively, which indicates a universal dependence ofq on (eB)T in both regimes for the parallel case, the origin of which should be the transverse density of lowest Landau level states proportional to eB. Finally, the asymmetric transverse momentum diffusion in the case of jet moving perpendicular to the magnetic field may give an interesting azimuthal asymmetry of the gluon Bremsstrahlung spectrum in the BDMPS-Z formalism. *

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Momentum fluctuations of heavy quarks in the gauge-string duality

Cited by 201 publications

References 55 publications

Transport properties and Langevin dynamics of heavy quarks and quarkonia in the Quark Gluon Plasma

Transport properties and Langevin dynamics of heavy quarks and quarkonia in the Quark Gluon Plasma

Angular structure of jet quenching within a hybrid strong/weak coupling model

Jet quenching parameter of the quark-gluon plasma in a strong magnetic field: Perturbative QCD and AdS/CFT correspondence

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