Phase structure and critical behavior of lattice φ4 theory at different temperatures

Hong Li, Tian Lun Chen

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The Variational-Cumulant Expansion method is applied to investigate the phase structure and the critical behavior of lattice φ4 theory at two different temperatures. The phase diagrams, the external current J as a function of the expectation value of the field operator 〈φL〉 are calculated to the third order analytically. The critical behaviors of the expectation value 〈φL〉, the renormalized mass mR and mR/〈φL〉 are given and compared with the mean-field scaling laws with logarithmic scaling corrections. It is shown that, at a fixed bare coupling, the broken phase at a lower temperature might be restored at a higher temperature and a bound on the Higgs-boson mass at definite temperature can exist.

Original languageEnglish (US)
Pages (from-to)151-156
Number of pages6
JournalZeitschrift fur Physik C-Particles and Fields
Volume74
Issue number1
DOIs
StatePublished - Mar 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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