Sökning: "dispersive representation"

Hittade 2 uppsatser innehållade orden dispersive representation.

1. 1. Abrasionsmekanismer i labtest och fält : Utvärdering av metoder för nötningsprovning av spetsar till pinnkultivatorer

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad materialvetenskap

   Författare :Clara Landström; [2022]
   Nyckelord :tribologi; materialvetenskap; abrasiv nötning;

   Sammanfattning : In this master thesis two simplified and small-scale methods for two-body and three-body abrasive wear were examined. It was examined how representative the methods were compared to field-tested points in a cultivator for agriculture. A total of six points with different compositions were tested and ranked based on the test results. LÄS MER

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

   Master-uppsats, Uppsala universitet/Kärnfysik

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

   Sammanfattning : 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. LÄS MER