Quenching of hadron spectra in media

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

doi:10.1088/1126-6708/2001/09/033

Cited by 334 publications

(488 citation statements)

References 25 publications

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“…We focus on the medium-induced radiation, as governed by the BDMPSZ mechanism [12,13,15], and ignore here effects due to vacuum radiation. In this approach, both gluon splitting and momentum broadening are controlled by a single parameterq, called the jet-quenching parameter.…”

Section: The Equation For the In-medium Qcd Cascadementioning

confidence: 99%

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Angular distribution of medium-induced QCD cascades

2015

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We provide a complete description of the angular distribution of gluons in a medium-induced QCD cascade. We identify two components in the distribution, a soft component dominated by soft multiple scatterings, and a hard component dominated by a few hard scatterings. The typical angle that marks the boundary between these two components is determined analytically as a function of the energy of the observed gluon and the size of the medium. We construct the complete solution (beyond the diffusion approximation) in the regime where multiple branchings dominate the dynamics of the cascade in the form of a power series in the number of collisions with the medium particles. The coefficients of this expansions are related to the moments of the distribution in the diffusion approximation and are determined analytically. The angular distribution may be useful in phenomenological studies of jet shapes in heavy-ion collisions.

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Section: The Equation For the In-medium Qcd Cascadementioning

confidence: 99%

“…The essential singularity at x = 1 can be understood as a Sudakov suppression factor [15] (i.e. the vanishing of the probability to emit no gluon in any finite time).…”

Section: The Energy Distributionmentioning

confidence: 99%

Angular distribution of medium-induced QCD cascades

2015

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“…k (2) k (2) k (1) k (1) k (2) k (1) k (2) FIG. 3: Forward cut diagrams representing one collisional interaction of a qq system with momenta k1 and k2 propagating through dense nuclear medium.…”

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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“…[ 11] we derived an analytic expression for the medium induced gluon radiation spectrum, ρ(x) = dN g /dx = ∞ n=1 ρ (n) (x), in such a series form, where x is the light cone momentum fraction carried by the radiated gluon (see also [ 12] and [ 13] for the relation of this approach to the asymptotic approach of Ref. [ 14]). …”

Section: Introductionmentioning

confidence: 99%

Jet tomography of Au+Au reactions including multi-gluon fluctuations

2002

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Jet tomography is the analysis of the attenuation pattern of high transverse momentum hadrons to determine certain line integral transforms of the density profile of the QCD matter produced in ultra-relativistic nuclear collisions. In this letter, we calculate the distortion of jet tomography due to multi-gluon fluctuations within the GLV radiative energy loss formalism. We find that fluctuations of the average gluon number, N g ∼ 3 for RHIC initial conditions, reduce the attenuation of pions by approximately a factor Z ≈ 0.4 − 0.5. Therefore the plasma density inferred from jet tomography without fluctuations must be enhanced by a factor 1/Z ∼ 2.

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Quenching of hadron spectra in media

Cited by 334 publications

References 25 publications

Angular distribution of medium-induced QCD cascades

Angular distribution of medium-induced QCD cascades

Collisional dissociation of heavy mesons in dense QCD matter

Jet tomography of Au+Au reactions including multi-gluon fluctuations

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