Angular Dependence of the Radiative Gluon Spectrum and the Energy Loss of Hard Jets in QCD Media

Details Angular Dependence of the Radiative Gluon Spectrum and the Energy Loss of Hard Jets in QCD Media Angular Dependence of the Radiative Gluon Spectrum and the Energy Loss of Hard Jets in QCD Media

1999-07-07

arxiv.org/abs/hep-ph/9907267v1

Phys.Rev. C60 (1999) 064902

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages and 7 figures, RevTex

Scientific paper

10.1103/PhysRevC.60.064902

The induced momentum spectrum of soft gluons radiated from a high energy quark propagating through a QCD medium is derived in the BDMPS formalism. A calorimetric measurement for the medium dependent energy lost by a jet with opening angle $\theta_{{\rm cone}}$ is proposed.The fraction of this energy loss with respect to the integrated one appears to be the relevant observable.It exhibits a universal behaviour in terms of the variable $\theta^2_{{\rm cone}} L^3 \hat q$ where $L$ is the size of the medium and $\hat q$ the transport coefficient. Phenomenological implications for the differences between cold and hot QCD matter are discussed.

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