Siegel Gauge in Vacuum String Field Theory

Details Siegel Gauge in Vacuum String Field Theory Siegel Gauge in Vacuum String Field Theory

2001-11-11

arxiv.org/abs/hep-th/0111087v3

JHEP 0201 (2002) 043

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, lanlmac; v3: comment added

Scientific paper

10.1088/1126-6708/2002/01/043

We study the star algebra of ghost sector in vacuum string field theory (VSFT). We show that the star product of two states in the Siegel gauge is BRST exact if we take the BRST charge to be the one found in hep-th/0108150, and the BRST exact states are nil factors in the star algebra. By introducing a new star product defined on the states in the Siegel gauge, the equation of motion of VSFT is characterized as the projection condition with respect to this new product. We also comment on the comma form of string vertex in the ghost sector.

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