Comments on superstring field theory and its vacuum solution

Details Comments on superstring field theory and its vacuum solution Comments on superstring field theory and its vacuum solution

2009-05-21

arxiv.org/abs/0905.3501v2

JHEP 0908:048,2009

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, 1 figure; v2. typos corrected

Scientific paper

10.1088/1126-6708/2009/08/048

We prove that the NS cubic superstring field theories are classically equivalent, regardless of the choice of Y_{-2} in their definition, and illustrate it by an explicit evaluation of the action of Erler's solution. We then turn to examine this solution. First, we explain that its cohomology is trivial also in the Ramond sector. Then, we show that the boundary state corresponding to it is identically zero. We conclude that this solution is indeed a closed string vacuum solution despite the absence of a tachyon field on the BPS D-brane.

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