Speaker
Prof.
Pyungwon Ko
(KIAS)
Description
Motivated by a possible anomaly in the forward-backward (FB) asymmetry of top quark (A_FB) observed at the Tevatron, we perform a model independent analysis on qqbar -> ttbar using an effective lagrangian with dim-6 four-quark operators.
We derive necessary conditions on new physics structures and the couplings that are consistent with the $t\bar{t}$ production cross section and A_FB measured at the Tevatron, and discuss possible new physics scenarios that could generate such dim-6 operators.
Author
Prof.
Pyungwon Ko
(KIAS)
Co-authors
Dr
Dong-Won Jung
(Physics Department and CMTP, National Central University, Jhongli, Taiwan, 32054)
Dr
Jaesik Lee
(Physics Division, National Center for Theoretical Sciences, Hsinchu, Taiwan 300)
Dr
Soo-hyeon Nam
(Korea Institute of Science and Technology Information, Daejeon 305-806, Korea)
