Mach shocks induced by partonic jets in expanding quark–gluon plasma

Satarov, L. M.; Stöcker, H.; Mishustin, I. N.

doi:10.1016/j.physletb.2005.08.102

Cited by 113 publications

(96 citation statements)

References 25 publications

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“…The possible hydrodynamic collective response of the plasma to the passage of an energetic parton through it was characterized earlier in refs. [171][172][173][174]; the holographic computation in refs. [123,125] provided a concrete realization in a full quantum field theoretical calculation, confirming that the anticipated hydrodynamic response could indeed be excited via the passage through the fluid of an energetic probe whose size is much smaller than 1/T .…”

Section: Medium Backreaction: Observable Consequences Of a Wake In Thmentioning

confidence: 99%

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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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Section: Medium Backreaction: Observable Consequences Of a Wake In Thmentioning

confidence: 99%

“…[171][172][173][174] we shall treat the additional momentum acquired by the medium as a consequence of the passage of the jet as a small perturbation. (For studies of the nonlinear response of the plasma, see refs.…”

Section: Jhep03(2017)135mentioning

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

View full text Add to dashboard Cite

show abstract

“…This broad structure is called the "away-side jet" and recoils against the "near-side jet" (or "trigger jet"). In the framework of hydrodynamics, this observation could be explained by the conical shock waves generated by large energy deposition in the hydrodynamical medium [3,4,5,6,7,8,9,10,11,12,13,14]. Although quite elegant, this understanding of the away-side jet in terms of conical shock waves still needs confirmation.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear waves in a quark gluon plasma

2010

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Recent measurements at RHIC suggest that a nearly perfect fluid of quarks and gluons is produced in A A collisions. Moreover the passage of supersonic partons through this medium seems to produce waves. These waves might pile up and form Mach cones, which would manifest themselves in the so called away-side jets, forming a broad structure in the angular distribution of the particles recoiling against a trigger jet of moderate energy. In most of the theoretical descriptions of these phenomena, the hydrodynamic equations are linearized for simplicity. We propose an alternative explanation for the observed broadening of the away-side peak. It is based on hydrodynamics but it is a consequence of the non-linearities of the equations, which instead of simple waves may lead to localized waves or even solitons.We investigate in detail the consequences of including the non-linear terms. We use a simple equation of state for the QGP and expand the hydrodynamic equations around equilibrium configurations. The resulting differential equations describe the propagation of perturbations in the energy density. We solve them numerically and find that localized perturbations can propagate for long distances in the plasma. Under certain conditions our solutions mimick the propagation of Korteweg -de Vries solitons.

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“…sound velocity, and transport coefficients. For the QGP fluid, the energetic partons in jets can be considered fast-moving sources depositing the energy and momentum, which are supposed to excite the conical shockwave, so-called Mach cone, as a hydrodynamic medium response [24][25][26][27][28]. The shockwave front propagates toward a specific angle from the direction of the moving source which is determined by the sound velocity of the fluid.…”

Section: Introductionmentioning

confidence: 99%