Renormalisation group determination of scalar mass bounds in a simple Yukawa-model

A. Jakovác, I. Kaposvári, A. Patkós

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The scalar mass is determined in the simplest cut-off regularized Yukawa-model in the whole range of stability of the scalar potential. Two versions of the Functional Renormalisation Group (FRG) equations are solved in the Local Potential Approximation (LPA), where also the possible existence of a composite fermionic background is taken into account. The close agreement of the results with previous studies taking into account exclusively the effect of the scalar condensate, supports a rather small systematic truncation error of FRG due to the omission of higher dimensional operators.

Original languageEnglish
Article number1645042
JournalInternational Journal of Modern Physics A
Volume31
Issue number28-29
DOIs
Publication statusPublished - Oct 20 2016

Fingerprint

scalars
truncation errors
systematic errors
condensates
cut-off
operators
composite materials
approximation

Keywords

  • Ground state stability
  • Landau-singularity
  • mass bounds
  • renormalisation group

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics

Cite this

Renormalisation group determination of scalar mass bounds in a simple Yukawa-model. / Jakovác, A.; Kaposvári, I.; Patkós, A.

In: International Journal of Modern Physics A, Vol. 31, No. 28-29, 1645042, 20.10.2016.

Research output: Contribution to journalArticle

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