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arXiv · 1102.0545

Top quark forward-backward asymmetry at Tevatron and its implications at the LHC

Biplob Bhattacherjee·Sudhansu S. Biswal·Diptimoy Ghosh
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Abstract

The measurement of forward-backward asymmetry in the top and anti-top quark ($t \bar{t}$) production has been recently reconfirmed by the CDF Collaboration and shows a more than $3\sigma$ deviation from the Standard Model(SM) prediction in the large $t \bar{t}$ invariant mass region. Models with new W$^{\prime}$ or Z$^{\prime}$ bosons have been invoked to explain this deviation. In the context of these models we perform a $\chi^2$ analysis with all the available experimental numbers in different $\Delta Y$ and $M_{t \bar{t}}$ bins. We show that for the $Z^{\prime}$ model the region of parameter space which explain the Tevatron asymmetry can be probed in the same sign top production channel by Tevatron itself. Moreover, we consider a recently proposed observable, the one sided forward-backward asymmetry ($A_{OFB}$) at the LHC and conclude that both the W$^{\prime}$ and Z$^{\prime}$ models can lead to sizable $A_{OFB}$ even at the LHC running at a center of mass energy of 7 TeV for the model parameters consistent with the Tevatron measurements.

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Biplob Bhattacherjee, Sudhansu S. Biswal, Diptimoy Ghosh. 2011-02-02. Top quark forward-backward asymmetry at Tevatron and its implications at the LHC. https://doi.org/10.1103/physrevd.83.091501

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