Forward-backward asymmetry in t anti-t production from flavour symmetries

Details Forward-backward asymmetry in t anti-t production from flavour symmetries Forward-backward asymmetry in t anti-t production from flavour symmetries

2011-02-16

arxiv.org/abs/1102.3374v2

Phys.Rev.Lett.107:012002,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, v2: PRL version, scalar numerics fixed, conclusions unchanged

Scientific paper

10.1103/PhysRevLett.107.012002

We show that the forward-backward asymmetry in top quark pair production can be enhanced by fields that transform nontrivially under the flavour group and satisfy Minimal Flavour Violation, while at the same time the constraints from associated effects on the d \sigma(t anti-t)/d M_{t anti-t} distribution, dijet resonance searches, same sign top pair production and other phenomenology are satisfied. We work out two examples in detail, one where a scalar colour anti-sextet field, that is also an anti-sextet of SU(3)_U, enhances the forward-backward asymmetry, and one where the enhancement arises from a vector colour octet field that is also an octet of SU(3)_U.

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