Note on the Thermal Behavior of the Neutron Electric Dipole Moment from QCD sum rules

Abstract

We use the method of thermal QCD sum rules to investigate the effects of temperature on the neutron electric dipole moment d_n induced by the vacuum \bar{\theta}-angle. Then, we analyze and discuss the thermal behaviour of the ratio {d_n \over \bar{\theta}} in connection with the restoration of the strong CP symmetry breaking.

Comments: 09 pages, 01 eps_figure, typos corrected, few sentences added for section 4, results and conclusion unchanged