The nonperturbative closed string tachyon vacuum to high level

Details The nonperturbative closed string tachyon vacuum to high level The nonperturbative closed string tachyon vacuum to high level

2006-09-28

arxiv.org/abs/hep-th/0609208v2

JHEP 0704:009,2007

Physics

High Energy Physics

High Energy Physics - Theory

24 pages. v2: typos corrected, clarified extrapolation in scheme B, and added extrapolated tachyon and dilaton vev's at the en

Scientific paper

10.1088/1126-6708/2007/04/009

We compute the action of closed bosonic string field theory at quartic order with fields up to level ten. After level four, the value of the potential at the minimum starts oscillating around a nonzero negative value, in contrast with the proposition made in [5]. We try a different truncation scheme in which the value of the potential converges faster with the level. By extrapolating these values, we are able to give a rather precise value for the depth of the potential.

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