https://doi.org/10.1140/epjc/s10052-014-2949-5
Regular Article - Theoretical Physics
SYM, Chern–Simons, Wess–Zumino couplings and their higher derivative corrections in IIA superstring theory
International Centre for Theoretical Physics, Strada Costiera 11, Trieste, Italy
* e-mail: ehatefi@ictp.it
Received:
14
May
2014
Accepted:
18
June
2014
Published online:
19
July
2014
We find the entire form of the amplitude of two fermion strings (with different chiralities), a massless scalar field and one closed string Ramond–Ramond (RR) in IIA superstring theory, which is different from its IIB one. We make use of a very particular gauge fixing and explore several new couplings in IIA. All infinite 
-channel scalar poles and 
-channel fermion poles are also constructed. We find a new form of the higher derivative corrections to two fermion-two scalar couplings and show that the first simple 
-channel scalar pole for the 
case can be obtained by having new higher derivative corrections to Supersymmetric Yang–Mills (SYM) couplings at third order of 
. We find that the general structure and the coefficients of the higher derivative corrections to two fermion-two scalar couplings are completely different from the derived higher derivative corrections of type IIB.
© SIF and Springer-Verlag Berlin Heidelberg, 2014
