Ultrarelativistic boost with scalar field

Understand

We present the ultrarelativistic boost of the general global monopole solution which is parametrized by mass and deficit solid angle.

• The problem is addressed from two different perspectives.
• In the first one the primary object for performing the boost is the metric tensor while in the second one the energy momentum tensor is used.
• Since the solution is sourced by a triplet of scalar fields that effectively vanish in the boosting limit we investigate the behavior of a scalar field in a simpler setup.