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hep-ph2010
The Limits of Custodial Symmetry
R. Sekhar Chivukula, Stefano Di Chiara, Roshan Foadi +1
We introduce a toy model implementing the proposal of using a custodial symmetry to protect the Zbb coupling from large corrections. This "doublet-extended standard model" adds a w…
hep-ph2010★ 26 cited
Flavor Dependence of the S-parameter
Stefano Di Chiara, Claudio Pica, Francesco Sannino
We extend the results of [arXiv:1006.0207 [hep-lat]] by computing the S-parameter at two loops in the perturbative region of the conformal window. Consistently using the expression…