2PI effective theory at next-to-leading order using the functional renormalization group
| Autor: | C. D. Phillips, Margaret E. Carrington, S. A. Friesen, D. Pickering, K. Sohrabi, B. A. Meggison |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
High Energy Physics - Theory
Physics Coupling constant Bethe–Salpeter equation 010308 nuclear & particles physics Scalar (mathematics) FOS: Physical sciences Renormalization group 01 natural sciences Renormalization High Energy Physics - Phenomenology Theoretical physics High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th) Quantum mechanics Quartic function 0103 physical sciences Effective field theory Functional renormalization group 010306 general physics Computer Science::Databases |
| Zdroj: | Physical Review |
| Popis: | We consider a symmetric scalar theory with quartic coupling in 4-dimensions. We show that the 4 loop 2PI calculation can be done using a renormalization group method. The calculation involves one bare coupling constant which is introduced at the level of the Lagrangian and is therefore conceptually simpler than a standard 2PI calculation, which requires multiple counterterms. We explain how our method can be used to do the corresponding calculation at the 4PI level, which can not be done using any known method by introducing counterterms. Comment: 25 pages, 10 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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