Non-Abelian Energy Loss at Finite Opacity

Gyulassy, Miklós; Lévai, P.; Vitev, Ivan

doi:10.1103/physrevlett.85.5535

Cited by 550 publications

(720 citation statements)

References 17 publications

(50 reference statements)

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“…Remarkably, a simple mass dependent energy shift, via Eqs. (15,16), was found to modify all direct and virtual diagrams. This result, proven in the appendices A-G made it possible to generalize the GLV zero mass results to the case of heavy quarks to all orders in opacity.…”

Section: Discussionmentioning

confidence: 99%

Heavy quark radiative energy loss in QCD matter

2004

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Heavy quark medium induced radiative energy loss is derived to all orders in opacity, (L/λg) n . The analytic expression generalizes the GLV opacity expansion for massless quanta to heavy quarks with mass M in a QCD plasma with a gluon dispersion characterized by an asymptotic plasmon mass, mg = gT / √ 2. Remarkably, we find that the general result is obtained by simply shifting all frequencies in the GLV series by (m 2 g +x 2 M 2 )/(2xE). Numerical evaluation of the first order in opacity energy loss shows that both charm and bottom energy losses are much closer to the incoherent radiation limit than light partons in nuclear collisions at both RHIC and LHC energies. However, the radiation lengths of heavy quarks remain large compared to nuclear dimensions and hence high pT heavy quark production is volume rather than surface dominated.

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Section: Discussionmentioning

confidence: 99%

Heavy quark radiative energy loss in QCD matter

2004

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“…It is thus surprising that until now a similar physics mechanism has not been considered for open heavy flavor. In this Letter, we investigated the perturbative QCD dynamics of open charm and beauty production and, in the framework of the reaction operator (GLV) approach [30,31,32,33] extended to composite qq systems, derived the mediuminduced dissociation probability for heavy D-and Bmesons traversing dense nuclear matter. We showed that the effective energy loss, which arises from the sequential fragmentation and dissociation of heavy quarks and mesons, is sensitive to the interplay between the formation times of the hadrons and the QGP and the detailed expansion dynamics of hot nuclear matter.…”

Section: Discussionmentioning

confidence: 99%

“…The GLV reaction operator formalism [30,31] was developed for calculating the induced radiative energy loss of hard quarks or gluons when they pass through a dense medium. In this approach, the multi-parton dynamics is described by a series expansion in χ =…”

Section: Collisional Dissociation Of Heavy Mesonsmentioning

confidence: 99%

Collisional dissociation of heavy mesons in dense QCD matter

2007

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In the framework of the reaction operator approach we calculate and resum the multiple elastic scattering of a fast qq system traversing dense nuclear matter. We derive the collisional broadening of the meson's transverse momentum and the distortion of its intrinsic light cone wave function. The medium-induced dissociation probability of heavy mesons is shown to be sensitive to the opacity of the quark-gluon plasma and the time dependence of its formation and evolution. We solve the system of coupled rate equations that describe the competition between the fragmentation of cand b-quarks and the QGP-induced dissociation of the D-and B-mesons to evaluate the quenching of heavy hadrons in nucleus-nucleus collisions. In contrast to previous results on heavy quark modification, this approach predicts suppression of B-mesons comparable to that of D-mesons at transverse momenta as low as pT ∼ 10 GeV. It allows for an improved description of the large attenuation of non-photonic electrons in central Au+Au reactions at RHIC.

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“…It is apparent (as assumed in [13]) that the c + b spectra are in good agreement with the electron spectra from heavy flavor decays for p t ∼ > 4 GeV. 6 In this simplified framework we capture the trend of the experimental data, with some room for effects due to heavy quark radiative energy loss. However, since the radial expansion of the QGP will lead to shorter life times of the plasma phase, we now turn to more realistic dynamical models.…”

Section: Heavy-ion Collisionsmentioning

confidence: 99%

“…The quenching of light quarks is well understood as an effect of radiative energy loss when propagating through the medium [5,6]. However, in the case of heavy quarks pure radiative energy loss seems not sufficient to explain experimental data (mainly from electron yields) on heavy flavor quenching [7,8,9,10], suggesting surprisingly strong attenuation.…”

Section: Introductionmentioning

confidence: 99%

Collisional energy loss of heavy quarks

et al. 2013

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We develop a transport approach for heavy quarks in a quark-gluon plasma, which is based on improved binary collision rates taking into account quantum statistics, the running of the QCD coupling and an effective screening mass adjusted to hard-thermal loop calculations. We quantify the effects of in-medium collisions by calculating the heavy flavor nuclear modification factor and the elliptic flow for RHIC energies, which are comparable to radiative effects. We also derive an analytic formula for the mean collisional energy loss of an energetic heavy quark in a streaming quark gluon plasma.

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Non-Abelian Energy Loss at Finite Opacity

Cited by 550 publications

References 17 publications

Heavy quark radiative energy loss in QCD matter

Heavy quark radiative energy loss in QCD matter

Collisional dissociation of heavy mesons in dense QCD matter

Collisional energy loss of heavy quarks

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