On exact tachyon potential in open string field theory

Citation
Aa. Gerasimov et Sl. Shatashvili, On exact tachyon potential in open string field theory, J HIGH EN P, 2000(10), 2000, pp. NIL_731-NIL_742
Citations number
25
Categorie Soggetti
Physics
Journal title
JOURNAL OF HIGH ENERGY PHYSICS
ISSN journal
10298479 → ACNP
Volume
2000
Issue
10
Year of publication
2000
Pages
NIL_731 - NIL_742
Database
ISI
SICI code
1029-8479(200010)2000:10<NIL_731:OETPIO>2.0.ZU;2-B
Abstract
In these notes we revisit the tachyon lagrangian in the open string field t heory using background independent approach of Witten from 1992. We claim t hat the tree level lagrangian (up to second order in derivatives and modulo some class of field redefinitions) is given by L = e(-T) (partial derivati veT)(2) + (1 + T)e(-T). Upon obvious change of variables this leads to the potential energy -phi (2) log phi (2)/e with canonical kinetic term. This l agrangian may be also obtained from the effective tachyon lagrangian of the p-adic strings in the limit p --> 1. Applications to the problem of tachyo n condensation are discussed.