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

Abstract

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.

13 pages, Latex, 7 figures, Two different effective potentials studied with similar temperatures showing consistent results. Final published version

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• A Novel Mechanism for $J/\psi$ Disintegration in Relativistic Heavy Ion Collisions
• Z(3) metastable states in Polyakov Quark Meson model
• Primordial magnetic field generation in the Quark Gluon Plasma phase
• Spontaneous CP violating quark scattering from asymmetric $Z\left(3\right)$ interfaces in QGP