Anton A. Gerasimov and Samson L. Shatashvili JHEP10(2000)034 doi:10.1088/1126-6708/2000/10/034
Anton A. Gerasimov1 and Samson L. Shatashvili2
Show affiliationsIn these notes we revisit the tachyon lagrangian in the open string field theory using background independent approach of Witten from 1992. We claim that the tree level lagrangian (up to second order in derivatives and modulo some class of field redefinitions) is given by L = e−T(∂T)2+(1+T)e−T. Upon obvious change of variables this leads to the potential energy −
2log
2/e with canonical kinetic term. This lagrangian may be also obtained from the effective tachyon lagrangian of the p-adic strings in the limit p→1. Applications to the problem of tachyon condensation are discussed.
11.25.Hf Conformal field theory, algebraic structures
14.80.-j Other particles (including hypothetical)
Issue 10 ( 1 October 2000)
Received 4 October 2000, accepted for publication 18 October 2000
Published 22 November 2000
Anton A. Gerasimov and Samson L. Shatashvili JHEP10(2000)034
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