Explaining the t tbar forward-backward asymmetry without dijet or flavor anomalies

Details Explaining the t tbar forward-backward asymmetry without dijet or flavor anomalies Explaining the t tbar forward-backward asymmetry without dijet or flavor anomalies

2011-03-14

arxiv.org/abs/1103.2757v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 6 figures; v2: notation clarified, references added

Scientific paper

We consider new physics explanations of the anomaly in the top quark forward-backward asymmetry measured at the Tevatron, in the context of flavor conserving models. The recently measured LHC dijet distributions strongly constrain many otherwise viable models. A new scalar particle in the antitriplet representation of flavor and color can fit the t tbar asymmetry and cross section data at the Tevatron and avoid both low- and high-energy bounds from flavor physics and the LHC. An s-channel resonance in uc to uc scattering at the LHC is predicted to be not far from the current sensitivity. This model also predicts rich top quark physics for the early LHC from decays of the new scalar particles. Single production gives t tbar j signatures with high transverse momentum jet, pair production leads to t tbar j j and 4 jet final states.

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