Axisymmetric non-abelian BPS monopoles from G2 metrics Original Research Article

Exact SU(2)×U(1) self-gravitating BPS global monopoles in four dimensions are constructed by dimensional reduction of eight-dimensional metrics with G2 holonomy asymptotic to cones over S3×S3. The solutions carry two topological charges in an interesting way. They are generically axially but not spherically symmetric. This last fact is related to the isometries and asymptotic topology of the G2 metrics. It is further shown that some G2 metrics known numerically reduce to supersymmetric cosmic strings.