Large Tree Level CP Violation in $e^+e^-\to t\bar{t}H^0$ in The Two Higgs Doublet Model

S. Bar-Shalom; D. Atwood; G. Eilam; R. R. Mendel; A. Soni

doi:10.1103/PhysRevD.53.1162

Large Tree Level CP Violation in $e^+e^-\to t\bar{t}H^0$ in The Two Higgs Doublet Model

High Energy Physics - Phenomenology 2009-10-28 v1

Authors: S. Bar-Shalom , D. Atwood , G. Eilam , R. R. Mendel , A. Soni

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Abstract

We find a large CP violation effect within the Two-Higgs-Doublet-Model for the reaction $e^+e^-\to t\bar{t}H^0$ at future linear colliders. The CP-asymmetry arises already at the tree level as a result of interference between diagrams with $H^0$ emission from $t$ (and $\bar{t}$ ) and its emission from a $Z^0$ and can be about 10--20\%. In the best case one needs a few hundred $t\bar{t}H^0$ events to observe CP violation at the 3 $\sigma$ level.

Keywords

Two Higgs doublet model CP violation tree level $e^+e^-$ collider $t\bar{t}H^0$ linear collider CP asymmetry Z boson

Cite

@article{arxiv.hep-ph/9508314,
  title  = {Large Tree Level CP Violation in $e^+e^-\to t\bar{t}H^0$ in The Two Higgs Doublet Model},
  author = {S. Bar-Shalom and D. Atwood and G. Eilam and R. R. Mendel and A. Soni},
  journal= {arXiv preprint arXiv:hep-ph/9508314},
  year   = {2009}
}

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Large Tree Level CP Violation in $e^+e^-\to t\bar{t}H^0$ in The Two Higgs Doublet Model

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