Radiative energy loss of high energy partons traversing an expanding QCD plasma

Baier, Rudolf; Dokshitzer, Yuri L.; Mueller, Alfred H.; Schiff, D.

doi:10.1103/physrevc.58.1706

Cited by 199 publications

(279 citation statements)

References 13 publications

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“…(4.4) and (4.6)) is treated as a fixed quantity, reabsorbed into the normalization ofq. In this approximation, the quark-gluon path integral (4.3) is exactly known [11,19] for the case of a single emitter with vanishing transverse velocity. The generalization to the present case, where the quark which enters the quark-gluon dipole possesses a non-zero transverse velocity u L , is easily to find and reads K qg (x + , x ⊥ ; y + , y ⊥ ; k + ) = (A.3)…”

Section: Jhep08(2011)015mentioning

confidence: 99%

“…We shall denote 11) anticipating that this quantity plays the role of the formation time. Two limits of eq.…”

Section: Jhep08(2011)015mentioning

confidence: 99%

“…[11,19] for details and also the appendix below). To be specific, let us ignore the transverse derivatives in eq.…”

Section: Jhep08(2011)015mentioning

confidence: 99%

“…From a microscopic point of view, the dominant mechanism for jet quenching at weak coupling and high energy is radiative energy loss associated with medium-induced gluon radiation [9][10][11][12][13][14][15][16][17] (see also the review papers [18,19] for more references). If the medium…”

Section: Introductionmentioning

confidence: 99%

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Interference effects in medium-induced gluon radiation

Casalderrey-Solana

Iancu

2011

J. High Energ. Phys.

131

157

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As a step towards understanding the in-medium evolution of a hard jet, we consider the interference pattern for the medium-induced gluon radiation produced by a color singlet quark-antiquark antenna embedded in a QCD medium with size L. We focus on the typical kinematics for medium-induced gluon radiation in the BDMPS-Z regime, that is, short formation times τ f ≪ L and relatively large emission angles θ ≫ θ c ≡ 2/ qL 3 , withq the 'jet quenching' parameter. We demonstrate that, for a dipole opening angle θ qq larger than θ c , the interference between the medium-induced gluon emissions by the quark and the antiquark is parametrically suppressed with respect to the corresponding direct emissions. Physically, this is so since the direct emissions can be delocalized anywhere throughout the medium and thus yield contributions proportional to L. On the contrary, the interference occurs only between gluons emitted at very early times, within the characteristic time scales for quantum and color coherence between the two emitters, which in this regime are much smaller than L. This implies that, for θ qq ≫ θ c , the medium-induced radiation by the dipole is simply the sum of the two BDMPS-Z spectra individually produced by the quark and the antiquark, without coherence effects like angular ordering. For θ qq ≪ θ c , the medium-induced radiation by the dipole vanishes.

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Section: Jhep08(2011)015mentioning

confidence: 99%

“…We shall denote 11) anticipating that this quantity plays the role of the formation time. Two limits of eq.…”

Section: Jhep08(2011)015mentioning

confidence: 99%

“…[11,19] for details and also the appendix below). To be specific, let us ignore the transverse derivatives in eq.…”

Section: Jhep08(2011)015mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Interference effects in medium-induced gluon radiation

Casalderrey-Solana

Iancu

2011

J. High Energ. Phys.

131

157

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“…Jet modification [7][8][9][10][11][12][13][14][15][16][17], and its associated transport coefficients [18][19][20] provide multi-scale hard probes of the QGP. Jets start with an off-shellness or virtuality Q 2 that * Corresponding Authors is typically of the order of the hard scale, orders of magnitude higher than any scale in the medium.…”

Section: Introductionmentioning

confidence: 99%

Multistage Monte Carlo simulation of jet modification in a static medium

Cao¹,

Park²,

Barbieri³

et al. 2017

Phys. Rev. C

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The modification of hard jets in an extended static medium held at a fixed temperature is studied using three different Monte-Carlo event generators (LBT, MATTER, MARTINI). Each event generator contains a different set of assumptions regarding the energy and virtuality of the partons within a jet versus the energy scale of the medium, and hence, applies to a different epoch in the space-time history of the jet evolution. For the first time, modeling is developed where a jet may sequentially transition from one generator to the next, on a parton-by-parton level, providing a detailed simulation of the space-time evolution of medium modified jets over a much broader dynamic range than has been attempted previously in a single calculation. Comparisons are carried out for different observables sensitive to jet quenching, including the parton fragmentation function and the azimuthal distribution of jet energy around the jet axis. The effect of varying the boundary between different generators is studied and a theoretically motivated criterion for the location of this boundary is proposed. The importance of such an approach with coupled generators to the modeling of jet quenching is discussed.

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Relativistic Nucleus-Nucleus Collisions and the QCD Matter Phase Diagram

Stock

2020

Particle Physics Reference Library

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This review will be concerned with our knowledge of extended matter under the governance of strong interaction, in short: QCD matter. Strictly speaking, the hadrons are representing the first layer of extended QCD architecture. In fact we encounter the characteristic phenomena of confinement as distances grow to the scale of 1 fm (i.e. hadron size): loss of the chiral symmetry property of the elementary QCD Lagrangian via non-perturbative generation of "massive" quark and gluon condensates, that replace the bare QCD vacuum [1]. However, given such first experiences of transition from short range perturbative QCD phenomena (jet physics etc.), toward extended, non perturbative QCD hadron structure, we shall proceed here to systems with dimensions far exceeding the force range: matter in the interior of heavy nuclei, or in neutron stars, and primordial matter in the cosmological era from electro-weak decoupling (10 −12 s) to hadron formation (0.5•10 −5 s). This primordial matter, prior to hadronization, should be deconfined in its QCD sector, forming a plasma (i.e. color conducting) state of quarks and gluons [2]: the Quark Gluon Plasma (QGP). In order to recreate matter at the corresponding high energy density in the terrestrial laboratory one collides heavy nuclei (also called "heavy ions") at ultrarelativistic energies. Quantum Chromodynamics predicts [2-4] a phase transformation

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Radiative energy loss of high energy partons traversing an expanding QCD plasma

Cited by 199 publications

References 13 publications

Interference effects in medium-induced gluon radiation

Interference effects in medium-induced gluon radiation

Multistage Monte Carlo simulation of jet modification in a static medium

Relativistic Nucleus-Nucleus Collisions and the QCD Matter Phase Diagram

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