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

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

2008-02-20

arxiv.org/abs/0802.2784v5

Nucl.Phys.B809:525-546,2009

Physics

High Energy Physics

High Energy Physics - Theory

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

Scientific paper

10.1016/j.nuclphysb.2008.09.039

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.

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