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

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

2009-12-07

arxiv.org/abs/0912.1105v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures, references added, to appear in PLB

Scientific paper

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.

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