Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-07-13
Phys.Rev.D80:126007,2009
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, Appendix B replaced by shorter argument in text (section 2.1), one reference added
Scientific paper
10.1103/PhysRevD.80.126007
In a previous work (arXiv:0902.3750 [hep-th]) we studied the world-sheet conformal invariance for superstrings in type IIB R-R plane-wave in semi-light-cone gauge. Here we give further justification to the results found in that work through alternative arguments using dynamical supersymmetries. We show that by using the susy algebra the same quantum definition of the energy-momentum (EM) tensor can be derived. Furthermore, using certain Jacobi identities we indirectly compute the Virasoro anomaly terms by calculating second order susy variation of the EM tensor. Certain integrated form of all such terms are shown to vanish. In order to deal with various divergences that appear in such computations we take a point-split definition of the same EM tensor. The final results are shown not to suffer from the ordering ambiguity as noticed in the previous work provided the coincidence limit is taken before sending the regularization parameter to zero at the end of the computation.
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