Friday, October 18, 2013
High Energy Theory Seminar
BPS, Non-BPS and D-brane anti D-brane effective actions in type II Superstring theory with their corrections to all orders in alpha-prime
Ehsan Hatefi, ICTP, Trieste
In this talk , I would like to introduce new techniques for deriving all kinds of effective actions ( including DBI ,Chern-Simons and Wess-Zumino for BPS and non-BPS branes as well as brane anti brane systems) to all orders of alpha-prime for type IIA,IIB Super string theories.
Motivated by arXive:1211.2413 (appeared in JHEP), 1211.5538 (appeared in JCAP) and based on super string amplitudes we also talk about a universal conjecture (involving BPS and non-BPS strings) for all higher derivative corrections in String theory . Making use of the scattering of Strings ,we point out how to look for all orders Super Yang-Mills couplings in type IIB(A) super string theories. The new effective actions for D-brane and anti D-brane within new couplings with all their corrections will be presented.
Having taken S-matrix formalism, we highlight several important comments on Myers action , its correct form and its application in M-theory,Ads/CFT . These new actions/couplings are neither inside Myers'terms nor within pull-back/Taylor expansions. If time permits, I would talk about selection rules and new ideas based on my recent attempts in this research topic. Finally we comment on some related issues.