BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:On the Beaming of Gluonic Fields at Strong Coupling - Larios Lopez
 \, B (Universidad Nacional Autnoma de Mxico (UNAM))
DTSTART:20120628T164500Z
DTEND:20120628T170000Z
UID:TALK38721@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:We examine the conditions for beaming of the gluonic field sou
 rced by a heavy quark in strongly-coupled 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 d
 ual to the quark remains unexpectedly close to the AdS boundary whenever t
 he quark moves ultra-relativistically. We also work out the validity condi
 tions for a related approximation scheme that proposed to explain the beam
 ing 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 
 ultra-relativistic uniform circular motion that motivated the proposal\, b
 ut unfortunately do not hold for much more gen eral quark trajectories. \n
LOCATION:Seminar Room 2\, Newton Institute Gatehouse
END:VEVENT
END:VCALENDAR