How to halve maximal supergravity

Details How to halve maximal supergravity How to halve maximal supergravity

2011-04-18

arxiv.org/abs/1104.3587v3

JHEP 1106:030,2011

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, 1 figure. v3: minor clarifications, typos corrected - published version

Scientific paper

10.1007/JHEP06(2011)030

We work out the truncation from maximal to half-maximal supergravity in four dimensions. In particular, we determine the explicit constraints on the embedding tensors of both theories. These tensors specify the complete theories, including gauge groups and scalar potentials. Firstly, we find the linear constraint on N=8 theories to allow for a truncation to N=4. Secondly, we determine the additional N=4 quadratic constraints following from N=8. Finally, we comment on a brane interpretation as tadpole conditions for the latter.

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