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SUMMARY:Revisiting extremely high energy QED bremsstrahlung in matter
DTSTART:20260218T130000Z
DTEND:20260218T140000Z
DTSTAMP:20260419T013600Z
UID:indico-event-13402@indico.ijclab.in2p3.fr
DESCRIPTION:Speakers: Omar Elgedawy (École polytechnique)\n\nVery high en
 ergy electrons traversing matter lose energy primarily through bremsstrahl
 ung and pair production\, initiating electromagnetic showers. At sufficien
 tly high energies\, the formation time of bremsstrahlung exceeds the mean 
 free time for elastic scattering in the medium\, leading to a suppression 
 of radiation known as the Landau–Pomeranchuk–Migdal (LPM) effect. In t
 his talk\, I revisit the LPM suppression of bremsstrahlung and examine how
  it is modified by quantum overlap with subsequent pair production. I show
  that\, at extremely high energies\, pair production can occur within the 
 bremsstrahlung formation time\, leading to sizable corrections to the stan
 dard LPM picture. Contrary to early qualitative expectations that such eff
 ects would further suppress radiation\, I find that quantum interference b
 etween bremsstrahlung and pair production instead leads to a substantial e
 nhancement of the bremsstrahlung rate relative to the conventional LPM res
 ult.\n\nhttps://indico.ijclab.in2p3.fr/event/13402/
LOCATION:100/2-A201 - Salle A201 (IJCLab)
URL:https://indico.ijclab.in2p3.fr/event/13402/
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