Theta Term in QCD sum rules at Finite Temperature and the Neutron Electric Dipole Moment

Details Theta Term in QCD sum rules at Finite Temperature and the Neutron Electric Dipole Moment Theta Term in QCD sum rules at Finite Temperature and the Neutron Electric Dipole Moment

2002-12-11

arxiv.org/abs/hep-ph/0212155v1

AIP Conf.Proc. 660 (2003) 170-176

Physics

High Energy Physics

High Energy Physics - Phenomenology

08pages, Latex, Invited Tall given at the Second International Workshop on Hadron Physics, Effective Theories of Low Energy QC

Scientific paper

10.1063/1.1570569

By using thermal QCD sum rules to investigate the $\bar{\theta}$ induced neutron electric dipole moment $d_n$, we have examined the behaviour of broken CP symmetry at finite temperature. We find that, below the critical temperature, the ratio $\mid {d_n \over \bar{\theta}}\mid$ slightly decreases but survives at temperature effects, implying T nonrestoration of CP-invariance \cite{Chabab}.

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