Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-10-16
Mod.Phys.Lett.A25:471-478,2010
Physics
High Energy Physics
High Energy Physics - Theory
6 pages
Scientific paper
10.1142/S021773231003183X
Adopting the gauge-invariant but path-dependent variables formalism, we study the coupling of torsion fields with photons in the presence of an external background electromagnetic. We explicitly show that, in the case of a constant electric field strength expectation value, the static potential remains Coulombic, while in the case of a constant magnetic field strength expectation value a confining potential is obtained. This result displays a marked qualitative departure from the usual coupling of axionlike particles with photons in the presence of an external magnetic field.
Gaete Patricio
Helayël-Neto Jose A.
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