Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-10-15
Phys.Rev.D71:037501,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, better figures, added discussion and references
Scientific paper
10.1103/PhysRevD.71.037501
Two photons can annihilate into a neutral pion-like resonance via the anomaly coupling, just like $\pi^0\gamma\gamma$ in QCD. In some strongly interacting electroweak symmetry breaking models, e.g., technicolor type models, there often exist neutral pion-like resonances. TeV photon colliders have a strong capability to discover such particles, because the standard model background in photon scattering goes through box diagrams and is therefore highly suppressed. In this study, we perform a signal-background comparison. We show that $e^+ e^-$ linear colliders running in $\gamma\gamma$ mode can discover such neutral-pion-like resonances with a decent sensitivity.
Cheung Kingman
Tseng Hsin-Wu
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