Neutral top-pion and $tγ(z)$ production at the HERA and THERA colliders

Details Neutral top-pion and $tγ(z)$ production at the HERA and THERA colliders Neutral top-pion and $tγ(z)$ production at the HERA and THERA colliders

2004-03-07

arxiv.org/abs/hep-ph/0403074v2

Phys.Lett. B591 (2004) 220-224

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, typos corrected, version accepted for publication in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2004.04.049

In the context of top-color assisted technicolor ($TC2$) models, we calculate the contributions of the neutral top-pion $ \pi_{t}^{0}$ to $t\gamma$ and $tz$ production via the processes $ ep\to \gamma c \to t\gamma $ and $ ep\to \gamma c \to tz$ at the $HERA$ and $THERA$ colliders. Our results show that the cross sections $\sigma_{t\gamma}(s)$ and $\sigma_{tz}(s)$ are very small at the $HERA$ collider with $\sqrt{s}=320GeV $. However, in most of the parameter space, $\sigma_{t\gamma}(s)$ or $\sigma_{tz}(s)$ is in the range of about $0.1pb \sim 1 pb$ at the $THERA$ collider with $\sqrt{s}=1000GeV$.

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