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A Local (Perturbative) Construction of Observables in Gauge Theories: The Example of QED

✍ Scribed by M. Dütsch; K. Fredenhagen

Publisher
Springer
Year
1999
Tongue
English
Weight
238 KB
Volume
203
Category
Article
ISSN
0010-3616

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✍ Paul Federbush 📂 Article 📅 1965 🏛 Elsevier Science 🌐 English ⚖ 113 KB

A Feynman diagram that has three particle intermediate states in all channels is studied. Choosing special values of the masses, in particular taking infrared divergent terms as certain masses go to zero, we explicitly calculate the spectral functions in this limit. They are nonzero in all three reg