Calculating quenching weights

By C. Salgado, U. Wiedemann. 2003

316 citations recorded by the source corpus.

We calculate the probability (``quenching weight'') that a hard parton radiates an additional energy fraction due to scattering in spatially extended QCD matter. This study is based on an exact treatment of finite in-medium path length, it includes the case of a dynamically expanding medium, and it extends to the angular dependence of the medium-induced gluon radiation pattern. All calculations are done in the multiple soft scattering approximation (Baier-Dokshitzer-Mueller-Peign\'e-Schiff--Zakharov ``BDMPS-Z''-formalism) and in the single hard scattering approximation (N=1 opacity approximation). By comparison, we establish a simple relation between transport coefficient, Debye screening mass and opacity, for which both approximations lead to comparable results. Together with this paper, a CPU-inexpensive numerical subroutine for calculating quenching weights is provided electronically. To illustrate its applications, we discuss the suppression of hadronic transverse momentum spectra in nucleus-nucleus collisions. Remarkably, the kinematic constraint resulting from finite in-medium path length reduces significantly the transverse momentum dependence of the nuclear modification factor, thus leading to consistency with the data measured at the Relativistic Heavy Ion Collider (RHIC).

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/01093cf1dd6c7452097d09fd7e701e447c472882

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In Nuclear and High Energy Physics

Citations in the corpus

Gauge/String Duality, Hot QCD and Heavy Ion Collisions (2011, methodology): “[177] with a model of the geometrical distribution of matter in the collision region.”
Jet quenching in high-energy heavy-ion collisions (2015, methodology): “This method has been widely applied in phenomenological studies using GLV and ASW formalisms.(50,56,57) The central quantity using Poisson ansatz is to calculate the probability distribution P (∆E) of parton energy loss, which may be obtained from single gluon emission kernel dNg/dω as follows:”
A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector (2012, methodology): “15For this, we use the quenching weights in [521] instead of the simplified expressions employed in [520].”
Strongly correlated quantum fluids: ultracold quantum gases, quantum chromodynamic plasmas and holographic duality (2012, methodology): “Based on an analysis of RAA using a Monte-Carlo implementation of the theory of perturbative energy loss [274, 275] the PHENIX collaboration has reported q̂ = 13.”
Drag force in AdS/CFT (2006, background): “But the mechanism is very different from more established theoretical descriptions of jet-quenching at RHIC, for example the framework ([23, 24, 25, 26] and references therein) in which energy loss depends on the square of the distance traveled because of destructive interference effects between the”
Study of high-pT charged particle suppression in PbPb compared to pp collisions at $\sqrt{s_{\mathrm{NN}}}=2.76~\mathrm{TeV}$ (2012, unknown): “76 TeV (ASW [35, 36] and YaJEM [37] including a model for elastic energy loss parameterized with the Pesc variable).”
Study of high-pT charged particle suppression in PbPb compared to pp collisions at sqrt(sNN)=2.76 TeV (2012, unknown): “76 TeV (ASW [35, 36] and YaJEM [37] including a model for elastic energy loss parameterized with the Pesc variable).”