| Autor: |
Dominik Stoeckinger |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2014). |
| Popis: |
Recent progress in the understanding of vacuum expectation values and of infrared divergences in different regularization schemes is reviewed. Vacuum expectation values are gauge and renormalization-scheme dependent quantities. Using a method based on Slavnov-Taylor identities, the renormalization properties could be better understood. The practical outcome is the computation of the b functions for vacuum expectation values in general gauge theories. The infrared structure of gauge theory amplitudes depends on the regularization scheme. The well-known predictionof the infrared structure in CDR can be generalized to the FDH and DRED schemes and is in agreement with explicit computations of the quark and gluon form factors. We discuss particularly the correct renormalization procedure and the distinction between MS and DR renormalization. An important practical outcome are transition rules between CDR and FDH amplitudes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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