Gravitational monopoles, anomalies and M$E_8$ bundles

Details Gravitational monopoles, anomalies and M$E_8$ bundles Gravitational monopoles, anomalies and M$E_8$ bundles

2004-10-06

arxiv.org/abs/hep-th/0410060v1

JHEP0411:017,2004

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, 1 figure

Scientific paper

10.1088/1126-6708/2004/11/017

In this paper we try to clarify the physical meaning of the gauge theory that underlies the K-theoretical classification of RR charges in type IIA. Our main tool are the conditions for the cancellation of the Freed-Witten global anomaly when we take into account the effects of a flat and a general B-field. In each case we will see how K-theory captures some eleven dimensional information. In the first case and studying the electric properties of the D6-brane we see an eleven dimensional U(2) gauge symmetry, while the second can be related to an $E_8$ theory. Moreover, in the reduction from the general to the flat case, we find that the Romans' mass gives the number of unstable intial D9-branes.

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