A Z ′ Boson and the Higgs Boson Mass
نویسنده
چکیده
The Standard Model fit prefers values of the Higgs Boson mass mH that are below the 114 GeV direct lower limit from LEP II. The discrepancy is acute if the 3.2σ disagreement for sinθ` eff W from the two most precise measurements is attributed to underestimated systematic error. In that case the data suggests new physics to raise the predicted value of mH . One of the simplest possibilities is a Z ′ boson, which would generically increase the prediction for mH as a result of Z-Z ′ mixing. We explore the effect of Z-Z ′ mixing on the mH prediction, using both the full data set and the reduced data set that omits the hadronic asymmetry measurements of sinθ` eff W , which are more likely than the leptonic asymmetry measurements to have underestimated systematic uncertainty. ar X iv :0 80 6. 08 90 v1 [ he pph ] 5 J un 2 00 8
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