Anti-B-B Mixing Constrains Topcolor-Assisted Technicolor
High Energy Physics - Phenomenology
2009-10-31 v3 High Energy Physics - Experiment
Abstract
We argue that extended technicolor augmented with topcolor requires that all mixing between the third and the first two quark generations resides in the mixing matrix of left-handed down quarks. Then, the anti-B_d--B_d mixing that occurs in topcolor models constrains the coloron and Z' boson masses to be greater than about 5 TeV. This implies fine tuning of the topcolor couplings to better than 1%.
Cite
@article{arxiv.hep-ph/0012073,
title = {Anti-B-B Mixing Constrains Topcolor-Assisted Technicolor},
author = {Gustavo Burdman and Kenneth Lane and Tonguc Rador},
journal= {arXiv preprint arXiv:hep-ph/0012073},
year = {2009}
}
Comments
9 pages, LaTeX, with one postscript figure. Version to appear in Physics Letters B. Minor typos corrected and note added on top-pion contribution to Z to b b-bar decay