A tachyon lump in closed string field theory
Abstract
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.
 Publication:

Journal of High Energy Physics
 Pub Date:
 September 2008
 DOI:
 10.1088/11266708/2008/09/056
 arXiv:
 arXiv:0804.0697
 Bibcode:
 2008JHEP...09..056M
 Keywords:

 High Energy Physics  Theory
 EPrint:
 13 pages, 4 figures