Essays about: "Cutkosky cutting rules"

Found 2 essays containing the words Cutkosky cutting rules.

1. 1. Triangle Loop in Scalar Decay and Cutting Rules

   University essay from Uppsala universitet/Institutionen för fysik och astronomi

   Author : Hazhar Ghaderi; [2013]
   Keywords : Cutkosky cutting rules; Feynman triangle loop diagram; two-fold Dirac delta functions; double Dirac delta functions; Dirac delta distribution; delta distribution;

   Abstract : In this report we will calculate the amplitude for a scalar-to-scalars (φ3  φ2φ2) decay which involves a triangle loop. We compute the real and imaginary part of the amplitude separately and will argue that this is much more straightforward and practical in this case rather than having to deal with or worry about branch cuts of logarithms. READ MORE

3. 2. The Rare Decay of the Neutral Pion into a Dielectron

   University essay from Uppsala universitet/Kärnfysik

   Author : Hazhar Ghaderi; [2013]
   Keywords : rare pion decay; Mellin transform; Mellin-Barnes representation; dispersive representation; dispersion relation; Kramers-Kronig relations; Cutkosky cutting rules; Feynman Loop diagram calculations;

   Abstract : We give a rather self-contained introduction to the rare pion to dielectron decay which in nontrivial leading order is given by a QED triangle loop. We work within the dispersive framework where the imaginary part of the amplitude is obtained via the Cutkosky rules. We derive these rules in detail. READ MORE