Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-11-07
Phys.Rev.D77:055005,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 11 eps figures, reference and clarifying remarks added
Scientific paper
10.1103/PhysRevD.77.055005
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.
Braam Felix
Chiara Stefano Di
Chivukula Sekhar R.
Flossdorf Michael
Simmons Elizabeth H.
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