# Nuclear Physics & RIKEN Theory Seminar

## "Non-Mach Conical Di-jet Correlations in AdS/CFT"

#### Presented by Jorge Noronha, Columbia University

Friday, October 10, 2008, 2:00 pm — Small Seminar Room, Bldg. 510

The reported observation of Mach cone-like correlations between tagged (near side) jets fragments and away side associated moderate pT < 4 GeV/c hadrons has generated a lot of interest because it may provide further evidence for fast relaxation times and the near perfect fluid property of the strongly Quark-Gluon Plasma (sQGP) produced in Au+Au reactions at RHIC. In this talk, we show that far zone Mach and Diffusion wake holograms'' produced by supersonic strings in AdS/CFT do not lead to observable conical angular correlations in the strict $N_c\to\infty$ supergravity limit if Cooper-Frye hadronization is assumed. However, a special nonequilibrium Neck'' zone close to the heavy quark is shown to give rise to an apparent sonic boom azimuthal angle distribution that however does not obey Mach's law. The observation of non-Mach conical correlations associated with tagged heavy quark jets would provide additional support for novel nonperturbative dynamics as suggested by the AdS/CFT string phenomenology.

Hosted by: Gregory Soyez

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