TY - JOUR
T1 - Spontaneous CP violation in the NJL model at theta = pi
AU - Boer, D.
AU - Boomsma, J.K.
N1 - Times Cited: 0
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
U2 - 10.1016/j.nuclphysa.2009.01.062
DO - 10.1016/j.nuclphysa.2009.01.062
M3 - Article
VL - 820
SP - 251C-254C
JO - Nuclear Physics A
JF - Nuclear Physics A
SN - 0375-9474
ER -
