Vector-like Quark Interpretation of Excess in Higgs Signal Strength
arXiv:1901.05626 · doi:10.1016/j.physletb.2019.134983
Abstract
There is a deviation in the average Higgs-signal strength for all the TeV data up to Summer 2018. We find that a slight reduction of the bottom-Yukawa coupling can fit the data better than the standard model. We suggest an extension with a vector-like quark doublet, of which the right-handed component of mixes nonnegligibly with the standard model quark. We show that the mixing would induce a reduction of the bottom Yukawa coupling. Simultaneously, the coupling of the boson to the right-handed quark increases, which could reduce the forward-backward asymmetry of bottom production at LEP and bring it closer to the experimental value.
arXiv comment14 pages, 3 figures
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