Neutral top-pion and $t\gamma (z)$ production at the HERA and THERA colliders

Abstract

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 $0.1pb\sim 1pb$ at the $THERA$ collider with $\sqrt{s}=1000GeV$.

arXiv comment10 pages, typos corrected, version accepted for publication in Phys. Lett. B

References in corpus (33)

• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions
• Strong Dynamics and Electroweak Symmetry Breaking
• Topcolor Assisted Technicolor
• Single Top Production as a Window to Physics Beyond the Standard Model
• Natural Topcolor--Assisted Technicolor
• Top quark condensation
• New Method for Detecting Charged (Pseudo-)Scalars at Colliders
• A New Model of Topcolor-Assisted Technicolor
• Scalars from Top-condensation Models at Hadron Colliders
• Top-Charm Associated Production in High Energy $e^{+}{e}^{-}$ Collisions
• Single Top Quark Production via FCNC Couplings at Hadron Colliders
• Direct Top Quark Production at Hadron Colliders as a Probe of New Physics
• Searching for $t\to cg$ at the Fermilab Tevatron
• Top-Charm Strong Flavor-Changing Neutral Currents at the Tevatron
• SUSY-Induced Top Quark FCNC Processes at Linear Colliders
• Threshold Effects on Heavy Quark Production in $\gamma \gamma$ Interactions
• Associated production of Intermediate Higgs or Z-boson with $t\bar{t}$ pair in $\gamma \gamma$ collision
• Probing Topcolor-Assisted Technicolor from Top-Charm Associated Production at LHC
• Anomalous t-c-g coupling: The connection between single top production and top decay
• The Production of Single t-Quarks at LEP and HERA
• Multilepton production via top flavour-changing neutral couplings at the CERN LHC
• Zt and γt production via top flavour-changing neutral couplings at the Fermilab Tevatron
• Search for Anomalous Top--Quark Interaction at LEP-2 Collider
• Top flavour-changing neutral coupling signals at a linear collider
• QCD corrections to FCNC single top production at HERA
• Neutral top-pion and top-charm production in high energy $e^{+}{e}^{-}$ collisions
• The process $e^{+}{e}^{-}\to \bar{t}c$ in topcolor-assisted technicolor models
• Searching for an anomalous $\bar{t}q\gamma$ coupling via single top quark production at a $\gamma \gamma$ collider
• SUSY-QCD Effect on Top-Charm Associated Production at Linear Collider
• Single Top Production at HERA and THERA
• Page charge of D-branes and its behavior in topologically nontrivial B-fields
• Heavy Flavour Physics at HERA - a Survey

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