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- W1572384282 abstract "The Tevatron has measured a discrepancy relative to the standard model prediction in the forward-backward asymmetry in top quark pair production. This asymmetry grows with the rapidity difference of the two top quarks. It also increases with the invariant mass of the $overline{t}t$ pair, reaching, for high invariant masses, 3.4 standard deviations above the next-to-leading order prediction for the charge asymmetry of QCD. However, perfect agreement between experiment and the standard model was found in both total and differential cross section of top quark pair production. As this result could be a sign of new physics we have parametrized this new physics in terms of a complete set of dimension six operators involving the top quark. We have then used a Markov chain Monte Carlo approach in order to find the best set of parameters that fits the data, using all available data regarding top quark pair production at the Tevatron. We have found that just a very small number of operators are able to fit the data better than the standard model." @default.
- W1572384282 created "2016-06-24" @default.
- W1572384282 creator A5055444470 @default.
- W1572384282 creator A5060311261 @default.
- W1572384282 creator A5069675064 @default.
- W1572384282 creator A5073413136 @default.
- W1572384282 creator A5073822272 @default.
- W1572384282 creator A5085192855 @default.
- W1572384282 date "2012-07-18" @default.
- W1572384282 modified "2023-10-10" @default.
- W1572384282 title "New physics contributions to<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msubsup><mml:mi>A</mml:mi><mml:mi>FB</mml:mi><mml:mrow><mml:mi>t</mml:mi><mml:mover accent=true><mml:mi>t</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:mrow></mml:msubsup></mml:math>at the Tevatron" @default.
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