Authors: César A Agón Alberto Güijosa Bryan O Larios
Publish Date: 2012/12/19
Volume: 2012, Issue: 12, Pages: 101-
Abstract
We examine the conditions for beaming of the gluonic field sourced by a heavy quark in stronglycoupled conformal field theories using the AdS/CFT correspondence Previous works have found that contrary to naive expectations it is possible to set up collimated beams of gluonic radiation despite the strong coupling We show that on the gravity side of the correspondence this follows directly for arbitrary quark motion and independently of any approximations from the fact that the string dual to the quark remains unexpectedly close to the AdS boundary whenever the quark moves ultrarelativistically We also work out the validity conditions for a related approximation scheme that proposed to explain the beaming effect though the formation of shock waves in the bulk fields emitted by the string We find that these conditions are fulfilled in the case of ultrarelativistic uniform circular motion that motivated the proposal but unfortunately do not hold for much more general quark trajectories
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