1111.3027 (Abhishek Atreya et al.)

Spontaneous CP violation in quark scattering from QCD Z(3) interfaces    [PDF]

Abhishek Atreya, Anjishnu Sarkar, Ajit M. Srivastava

In this paper, we explore the possibility of spontaneous CP violation in the
scattering of quarks and anti-quarks from QCD Z(3) domain walls. The CP
violation here arises from the nontrivial profile of the background gauge field
$(A_{0})$ between different Z(3) vacua. We calculate the spatial variation of
$A_{0}$ across the Z(3) interface from the profile of the Polyakov loop
$L(\vec{x})$ for the Z(3) interface and calculate the reflection of quarks and
antiquarks using the Dirac equation. This spontaneous CP violation has
interesting consequences for the relativistic heavy-ion collision experiments,
such as baryon enhancement at high $P_{T}$. It also acts as a source of
additional J/$\psi$ suppression. We also discuss its implications for the early
universe.

View original: http://arxiv.org/abs/1111.3027