The H to 4 lepton partial width shifts by up to about 6 percent at one loop when the Higgs trilinear coupling is anomalous, offering a new observable for the Higgs self-coupling.
Dijet Invariant Mass Distribution in Top Quark Hadronic Decay with QCD Corrections
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abstract
The dijet invariant mass distributions from the hadronic decay of unpolarized top quark ($t\to b W^+$ followed by $W^+\to u \bar{d}$) are calculated, including the next-to-leading order QCD radiative corrections. We treat the top decay in the complex mass scheme due to the existence of the intermediate state W boson. Our analytical expressions are also available in different dimensional regularization schemes and $\gamma_5$ strategies. Finally, in order to construct the jets, we use different jet algorithms to compare their influences on our results. The obtained dijet mass distributions from the top quark decay are useful to distinguish these dijets from those produced via other sources and to clarify the issue about the recent CDF Collaborations' $Wjj$ anomaly.
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Effect of anomalous $HHH$ coupling on the decay $H\rightarrow Z\,Z^*\rightarrow$ 4 charged leptons
The H to 4 lepton partial width shifts by up to about 6 percent at one loop when the Higgs trilinear coupling is anomalous, offering a new observable for the Higgs self-coupling.