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arXiv · 0711.1127

Hypercharge-Universal Topcolor

Felix Braam·Michael Flossdorf·R. Sekhar Chivukula·Stefano Di Chiara·Elizabeth H. Simmons
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Abstract

We propose and discuss the phenomenology of a Topcolor-assisted Technicolor (TC2) model with a flavor-universal hypercharge sector. After discussing the symmetry breaking pattern and low-energy effective Lagrangian, we examine various experimental and theoretical constraints, finding that precision electroweak measurements yield the strongest bounds on the model. We perform a combined fit to all available $Z$-pole and LEP2 data and find that the goodness of fit for hypercharge-universal topcolor is comparable to that of the Standard Model. In contrast, TC2 models with a flavor non-universal hypercharge sectors are markedly disfavored by the data.

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Felix Braam, Michael Flossdorf, R. Sekhar Chivukula, Stefano Di Chiara, Elizabeth H. Simmons. 2008-01-03. Hypercharge-Universal Topcolor. https://doi.org/10.1103/physrevd.77.055005

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