Model independent analysis of the forward-backward asymmetry of top quark production at the Tevatron

Authors:
  • DJDong-Won Jung
    Dong-Won Jung
  • PKP. Ko
    P. Ko
  • JLJae Sik Lee
    Jae Sik Lee
  • SNSoo-Hyeon Nam
    Soo-Hyeon Nam
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Abstract
Motivated by a possible anomaly in the forward-backward (FB) asymmetry of top quark (A_{\rm FB}) observed at the Tevatron, we perform a model independent analysis on q \bar{q} \to t \bar{t} 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_{\rm FB} measured at the Tevatron, and discuss possible new physics scenarios that could generate such dim-6 operators.