Spontaneous CP violation in the NJL model at theta = pi

D. Boer, J.K. Boomsma

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    As is well-known, spontaneous CP-violation in the strong interaction is possible at θ = π, which is commonly referred to as Dashen's phenomenon. This phenomenon has been studied extensively using chiral Lagrangians. Here the two-flavor NJL model at θ = π is discussed. It turns out that the occurrence of spontaneous CP-violation depends on the strength of the 't Hooft determinant interaction, which describes the effect of instanton interactions. The dependence of the phase structure, and in particular of the CP-violating phase, on the quark masses, temperature, baryon and isospin chemical potential is examined in detail. The latter dependence shows a modification of the charged pion condensed phase first discussed by Son and Stephanov. © 2009 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)251C-254C
    JournalNuclear Physics A
    Volume820
    DOIs
    Publication statusPublished - 2009

    Bibliographical note

    Times Cited: 0

    Fingerprint Dive into the research topics of 'Spontaneous CP violation in the NJL model at theta = pi'. Together they form a unique fingerprint.

  • Cite this