Physics – Mathematical Physics
Scientific paper
2009-05-03
Phys.Lett.B678:411-415,2009
Physics
Mathematical Physics
15 pages; v3:2 reference added, misprints corrected. Version to appear in PLB
Scientific paper
10.1016/j.physletb.2009.06.042
We consider the non-relativistic c -> \infty contraction limit of the (N=2k)- extended D=4 superconformal algebra su(2,2;N), introducing in this way the non-relativistic (N=2k)-extended Galilean superconformal algebra. Such a Galilean superconformal algebra has the same number of generators as su(2,2|2k). The usp(2k) algebra describes the non-relativistic internal symmetries, and the generators from the coset u(2k)/usp(2k) become central charges after contraction.
de Azcarraga Jose A.
Lukierski Jerzy
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