Spontaneous CP-violation in the strong interaction at theta = pi
| dc.creator | Boer, Daniel | |
| dc.creator | Boomsma, Jorn K. | |
| dc.date | 2008-06-10 | |
| dc.date | 2008-09-26 | |
| dc.date.accessioned | 2026-07-07T11:51:32Z | |
| dc.date.available | 2026-07-07T11:51:32Z | |
| dc.description | Spontaneous CP-violation in the strong interaction is analyzed at theta = pi within the framework of the two-flavor NJL model. It is found that the occurrence of spontaneous CP-violation at theta = pi 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. When available a comparison to earlier results from chiral perturbation theory is made. From our results we conclude that spontaneous CP-violation in the strong interaction is an inherently low-energy phenomenon. In all cases we find agreement with the Vafa-Witten theorem, also at nonzero density and temperature. Meson masses and mixing in the CP-violating phase display some unusual features as a function of instanton interaction strength. A modification of the condition for charged pion condensation at nonzero isospin chemical potential and a novel phase of charged a_0 mesons are discussed. | |
| dc.description | 15 pages, 11 eps figures; matches version published in Phys. Rev. D, reference added, corrected Eq. 16, modified discussion Ref. 9 | |
| dc.identifier | https://arxiv.org/abs/0806.1669 | |
| dc.identifier | http://arxiv.org/abs/0806.1669 | |
| dc.identifier | Phys.Rev.D78:054027,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.054027 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/203929 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Spontaneous CP-violation in the strong interaction at theta = pi | |
| dc.type | text |