Boosting Taub-NUT to a BPS NUT-wave

Details Boosting Taub-NUT to a BPS NUT-wave Boosting Taub-NUT to a BPS NUT-wave

2008-11-04

arxiv.org/abs/0811.0538v1

JHEP 0901:045,2009

Physics

High Energy Physics

High Energy Physics - Theory

12 pages

Scientific paper

10.1088/1126-6708/2009/01/045

The boosted Taub-NUT metric with zero ADM mass is shown to possess a dual momentum in the direction of the boost giving credit to the existence of another 4-vector K_\mu in linearized gravity associated to the NUT charge and dual to the usual P_\mu. Taking the infinite boost limit we obtain a shock pp-wave with NUT charge. We show that the latter is the gravitational dual of the infinitely boosted Schwarzschild metric, also known as the Aichelburg-Sexl pp-wave. We review the fact that this new shock pp-wave is also an half-BPS solution of N=1 supergravity. It has a BPS bound equal to K_t=|K_z|.

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