Monte Carlo event generators & the top quark forward--backward asymmetry

Abstract

The leading-order accurate description of top quark pair production, as usually employed in standard Monte Carlo event generators, gives no rise to the generation of a forward--backward asymmetry. Yet, non-negligible -- differential as well as inclusive -- asymmetries may be produced if coherent parton showering is used in the hadroproduction of top quark pairs. In this contribution we summarize the outcome of our study of this effect. We present a short comparison of different parton shower implementations and briefly comment on the phenomenology of the colour coherence effect at the Tevatron.

6 pages, 10 figures, contribution to the proceedings of the HCP symposium 2012 in Kyoto, Japan

References in corpus (2)

• PYTHIA 6.4 Physics and Manual
• Top quark pair production in association with a jet: QCD corrections and jet radiation in top quark decays

Cited by in corpus (3)

• NLO QCD corrections to W+ W- b anti-b production with leptonic decays in the light of top quark mass and asymmetry measurements
• Measurement of the leptonic asymmetry in ttbar events produced in ppbar collisions at sqrt(s)=1.96 TeV
• Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from $t\bar{t}$ production at the Tevatron