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- W77148811 abstract "One of the most trusted and accurate probes to the structure of elementary particles is found in the difference between the experimental and theoretical value of the magnetic moment, the electric-dipole moment and the electric-quadrupole moment of elementary particles [1], [2]. Supersymmetry [3], grand unification [4] and higher field-theoretic corrections can account for the measured g factor of the electron to within a margin of a NgMeas2gTheor NE10 leaving open the question of whether composite particles effects can account for the difference [5, 6]. Also it might be that in high magnetic fields environmental effects might produce corrections to the magnetic moment in spin phenomena that cannot be described by a Hamiltonian [7-9]. Even the Lamb shift with its precise experimental verification can receive temperaturedependent corrections that have no Hamiltonian origin to them [10]. In addition to these possibilities, there is another correction to the magnetic moment of the electron that has its origin rooted in topological notions, namely the corrections to the magnetic moment induced by a disclination produced by a cosmic string [11, 12]. The basic reason for this phenomena is the “Casimir effect”, basically the disclination modifies the vacuum state of the quantum fields in the neighborhood of the string due to the non-trivial topology which in turn modifies the magnetic moment of the electron. In what follows we point out that this effect can be used to identify cosmic strings in a cosmological setting by observing Zeeman lines due to spin flips which depend on the distance from the string. If a characteristic variation of the Zeeman frequency with distance from the string is found that varies inversely with the distance squared from the string, then the curvature of the plot can be used to calculate the disclination angle produced by the string and in turn the string mass density." @default.
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- W77148811 date "1997-10-01" @default.
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- W77148811 title "Zeeman splitting in the field of a cosmic string." @default.
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