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1. "Jet quenching at RHIC"
by Peter Jacobs (CERN/LBNL)
by Peter Jacobs (CERN/LBNL)
The suppression of high pt hadron yields and correlations measured in nuclear collisions at RHIC presents strong evidence for significant partonic energy loss in dense QCD matter ("jet quenching").
I will review the available data, with an emphasis on recent developments reported at the Hard Probes conference in early November. I will also discuss hadron production in the not-so-high pt region (pt~3-5 GeV/c), which exhibits several striking but as yet not well understood nuclear effects that may be due to the interplay between fragmentation and soft processes in the bulk medium.
2. "New theoretical ideas on jet quenching"
by Nestor Armesto Perez (CERN)
I will present some new theoretical ideas on jet quenching. After a brief review of the current theoretical approach to radiative energy loss of fast partons in a QCD medium, its effects on single particle spectra and the influence of the mass of the parent parton will be quickly addressed. Then I will turn to more differential observables.
The modification of jet shapes and of the associated multiplicity distributions will be shown. The impact of low transverse momentum collective flow on energy loss will be analyzed and exemplified by two cases: First, longitudinal flow may induce asymmetries in jet profiles and the associated particle distributions in pseudorapidity and azimuthal angle. Second, transverse flow may contribute sizably to the high transverse momentum azimuthal asymmetry, by selective elimination of those hard partons which propagate with significant inclination against the flow field.
Organiser(s): Yiota Foka and Urs Achim Wiedemann
More information: http://home.cern.ch/a/alicedoc/www/chic/