Rotating mesons in the presence of higher derivative corrections from gauge-string duality

We consider a rotating quark-antiquark (qq-bar) pair in N=4 thermal plasma. By using the AdS/CFT correspondence, the properties of this system are investigated. In particular, we study variation of a rotating string radius at the boundary as a function of its tip and angular velocity. We also extend the results to higher derivative corrections, i.e.R2 and R4 which correspond to finite coupling corrections on the rotating quark-antiquark system in the hot plasma. In the R4 case and for fixed angular velocity the string endpoints become more and more separated as λ-1 decreases. To study R2 corrections, rotating quark-antiquark system in Gauss-Bonnet background has been considered. We summarize the effects of these corrections in the conclusion section.