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Astrophysical Implications of Strong CP Violation

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If you have a question about this talk, please contact Baojiu Li .

In this seminar we shall analyze the response of the QCD vacuum to an external magnetic field, in the case in which CP is broken by the strong interaction. We show that, due to the presence of QCD instantons, the external magnetic field generates an anomalous electric dipole moment of the vacuum. We study the magnitude of this effect induced by the weak cosmological large-scale magnetic fields, and by the strong magnetic fields permeating the vicinity of neutron stars. We show that the polarization induced by the magnetic field of a magnetar could accelerate electric charges up to energies of the order Ī‘ 10^3 TeV.

This talk is part of the Theoretical Physics Colloquium series.

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Main Lecture Theatre, Old Divinity School, St John's College, Cambridge Ienter from All Saints' Passage" Meade Room, Faculty of Economics, Cambridge Betty & Gordon Moore Library

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