2017/12/21 by Jose R. Espinosa, Thomas Konstandin · 1 citation
Physics and Astronomy · #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.97.056020
published as Phys. Rev. D 97, 056020 (2018) · 30 pages, 3 figures
arxiv created 2017/12/21 · arxiv updated 2018/04/04
The perturbative effective potential calculated in Landau gauge suffers from infrared problems due to Goldstone boson loops. These divergences are spurious and can be removed by a resummation procedure that amounts to a shift of the mass of soft Goldstones. We prove this to all loops using an effective theory approach, providing a compact recipe for the shift of the Goldstone mass that relies on the use of the method of regions to split soft and hard Goldstone contributions.