103 citations · 216 across the 5 of their papers we have counts for
5 papers
The influence of strong magnetic fields and instantons on the phase structure of the two-flavor NJL model
Jorn K. Boomsma, Daniel Boer
Both in heavy-ion collisions as in magnetars very strong magnetic fields are produced, which has its influence on the phases of matter involved. In this paper we investigate the ef…
The high temperature CP-restoring phase transition at theta = pi
Jorn K. Boomsma, Daniel Boer
The CP-restoring phase transition at theta = pi and high temperature is investigated using two related models that aim to describe the low-energy phenomenology of QCD, the NJL mode…
Spontaneous CP violation in the NJL model at theta = pi
Jorn K. Boomsma, Daniel Boer
As is well-known, spontaneous CP-violation in the strong interaction is possible at theta = pi, which is commonly referred to as Dashen's phenomenon. This phenomenon has been studi…
Spontaneous CP-violation in the strong interaction at theta = pi
Daniel Boer, Jorn K. Boomsma
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-vio…
The box diagram in Yukawa theory
Bernard L. G. Bakker, Jorn K. Boomsma, Chueng-Ryong Ji
We present a light-front calculation of the box diagram in Yukawa theory. The covariant box diagram is finite for the case of spin-1/2 constituents exchanging spin-0 particles. In…