TALKS by E. Kolomeitsev

Landau-Pomeranchuk-Migdal Effect

           in QED and QCD

   and Parton Energy Loss in QGP


Talk given at Technical University  Darmstad, Jan 1999
 

1. Introduction

Agenda Controversy in the LPM effect theory

2. Radiation

2.1 Radiation probability
Matrix element of a radiation process is derivedfrom the Lagrangian of QED Radiation probabilty for a classical electron Radiation due to the change of velocity

2.2 Coherence length
Radiation time Another interpretaion of a radiation time From  radiation time to coherence length
 

3. Multiple Scattering Effects on Radiation Processes in Medium

3.1 Multiple Scattering
Multiple scattering

3.2 Landau-Pomeranchuk-Migdal Effect
Calculations of Landau and Pomeranchuk Calculations of   Migdal
Bethe-Heitler vs. Migdal formula When LPM effect is important
 

4. Experiments on LPM effect
 

4.1 LPM in Cosmic Ray Showers
Cosmic ray  shower Observables

4.2 LPM on Accelerator
Experiment in Serpukhov Experiement in SLAC
 
 

5.  Soft Radiation in Collision.  Energy Loss
 

5.1 Soft Photon and Soft Gluon Radiation
Soft photon radiation Soft gluon radiatoin Gauge invariance and multiple scattering of gluons
 
 

6. Manifestation of Parton Energy Loss

6.1 Jets

6.2 Modification of a jet fragmentation function

6.3 Particle Production

6.3.1 charm and botom mesons

6.3.2 dileptons

6.4 Energy Loss vs. Data

6.5 How take into account energy loss


March 3. 2000, E.E. Kolomeitsev