Top quark forward-backward asymmetry and same-sign top quark pairs

Edmond L. Berger, Qing Hong Cao, Chuan Ren Chen, Chong Sheng Li, Hao Zhang

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91 引文 斯高帕斯(Scopus)

摘要

The top quark forward-backward asymmetry measured at the Tevatron collider shows a large deviation from standard model expectations. Among possible interpretations, a nonuniversal Z model is of particular interest as it naturally predicts a top quark in the forward region of large rapidity. To reproduce the size of the asymmetry, the couplings of the Z to standard model quarks must be large, inevitably leading to copious production of same-sign top quark pairs at the energies of the Large Hadron Collider (LHC). We explore the discovery potential for tt and ttj production in early LHC experiments at 7-8 TeV and conclude that if no tt signal is observed with 1fb-1 of integrated luminosity, then a nonuniversal Z alone cannot explain the Tevatron forward-backward asymmetry.

原文英語
文章編號201801
期刊Physical Review Letters
106
發行號20
DOIs
出版狀態已發佈 - 2011 五月 17

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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