Abstract
We study the response of an infinite, asymptotically static N = 4 plasma to a generic localized source in the probe approximation. At large distances, the energy-momentum tensor of the plasma includes a term which satisfies the constitutive relations of linearized hydrodynamics, but it can also include a non-hydrodynamical term which contributes at the same order as viscous corrections, or even at leading order in some cases. The conditions for the appearance of a laminar wake far behind the source and its relevance for phenomenological models used to explain di-hadron correlations are discussed. We also consider the energy-momentum tensor near the source, where the hydrodynamical approximation can be expected to break down. Our analysis encompasses a wide range of sources which are localized in the bulk of AdS, including trailing strings, mesonic and baryonic configurations of strings, and point particles.
Original language | English (US) |
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Pages (from-to) | 188-219 |
Number of pages | 32 |
Journal | Nuclear Physics B |
Volume | 813 |
Issue number | 1-2 |
DOIs | |
State | Published - May 21 2009 |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics