On effective actions of non-BPS branes and their higher derivative corrections

Abstract

By calculating various disk level S-matrix elements and studying in details their momentum expansions, we have extracted some of the couplings in tachyon DBI action and Wess-Zumino terms of the non-BPS branes, and their higher derivative corrections. In particular, we have found that there is exact consistency between field theory and string theory tachyon pole of S-matrix element of one RR and three tachyons provided that one takes into account the fact that the tachyon vertex operator in 0 picture to be along the Pauli matrix ${\sigma }_1$ whereas the tachyon in -1 picture to be along the ${\sigma }_2$ direction. This internal CP factors should be included in the tachyon DBI part of the effective action.

arXiv comment26 pages, latex file; V5: a missing term in the modified tachyon DBI action added

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Cited by in corpus (5)

• Open & Closed vs. Pure Open String Disk Amplitudes
• More on WZ action of non-BPS branes
• On higher derivative corrections to Wess-Zumino and Tachyonic actions in type II super string theory
• On modified tachyon DBI action
• Dirac-Born-Infeld actions and Tachyon Monopoles