Charge asymmetry: a theory appraisal

Details Charge asymmetry: a theory appraisal Charge asymmetry: a theory appraisal

2010-07-25

arxiv.org/abs/1007.4328v1

Nuovo Cim.C33:04,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

Presented at 3rd International Workshop on Top Quark Physics (TOP 2010), Bruges, Belgium, 31 May - 4 Jun 2010. 8 pages

Scientific paper

The most recent measurements at Tevatron of the charge asymmetry in top-antitop quark pair production reduce the discrepancy with the Standard Model from 2sigma to 1.7sigma, and open a little window, at 95% C.L., for negative contributions to the charge asymmetry beyond the SM. We update our analysis for colour octet gauge bosons or axigluons in flavour universal and flavour non universal scenarios. We review other possible models and make an educated guess on their parameter space allowed by the new measurements. Finally, we comment on the prospects to measure the charge asymmetry at the LHC.

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