Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-09-27
Nucl.Phys.B572:112-130,2000
Physics
High Energy Physics
High Energy Physics - Theory
Latex, 23 pages; minor revisions, and references added
Scientific paper
10.1016/S0550-3213(99)00829-9
We obtain new solutions where a string and a pp-wave lie in the common worldvolume directions of the non-standard intersection of two gauge 5-branes in the heterotic string. The two 5-branes are supported by independent SU(2) Yang-Mills instantons in their respective (non-overlapping) transverse spaces. We present a detailed study of the unbroken supersymmetry, focusing especially on a comparison between a direct construction of Killing spinors and a counting of zero eigenvalues in the annticommutator of supercharges. The results are in agreement with some previous arguments, to the effect that additional zero eigenvalues resulting from a ``fine-tuning'' between positive-energy and negative-energy contributions from different components in an intersection are spurious, and should not be taken as an indication of supersymmetry enhancements. These observations have a general applicability that goes beyond the specific example we study in this paper.
Lima Eduardo
Lu Hai
Ovrut Burt A.
Pope Christopher N.
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