A tachyon lump in closed string field theory

Details A tachyon lump in closed string field theory A tachyon lump in closed string field theory

2008-04-04

arxiv.org/abs/0804.0697v3

JHEP 0809:056,2008

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, 4 figures; typos corrected; clarifications added

Scientific paper

10.1088/1126-6708/2008/09/056

We find a codimension one lump solution of closed bosonic string field theory. We consider vertices up to quartic order and include in the string field the tachyon, the ghost dilaton, and a metric fluctuation. While the tachyon profile clearly is that of a lump, we observe that the ghost dilaton is roughly constant in the direction transverse to the lump, equal to the value it takes in the nonperturbative tachyon vacuum. We explain, with a simple model, why this should be expected.

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