On higher derivative terms in tachyon effective actions

TY - JOUR

T1 - On higher derivative terms in tachyon effective actions

AU - Lambert, N D

AU - Sachs, I

PY - 2001

Y1 - 2001

N2 - We reconstruct the tachyon effective action for unstable D-branes in superstring theory by examining its behaviour near exactly marginal deformations, where the ambigous higher derivative terms can be eliminated. We then compare this action with that obtained in boundary string field theory and find remarkable agreement. In particular, the tension for lower-dimensional branes and the BI-action for the centre of mass motion are reproduced exactly. We also comment on the action for tachyons on the kink in a D-brane/anti-D-brane system and on bosonic string theory.

AB - We reconstruct the tachyon effective action for unstable D-branes in superstring theory by examining its behaviour near exactly marginal deformations, where the ambigous higher derivative terms can be eliminated. We then compare this action with that obtained in boundary string field theory and find remarkable agreement. In particular, the tension for lower-dimensional branes and the BI-action for the centre of mass motion are reproduced exactly. We also comment on the action for tachyons on the kink in a D-brane/anti-D-brane system and on bosonic string theory.

UR - http://www.scopus.com/inward/record.url?scp=33744536863&partnerID=8YFLogxK

M3 - Article

SN - 1029-8479

VL - 2001

SP - XLX-18

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 6

ER -