Abstract
Motivated by the recent result reported from LHC on the di-photon search from the Standard Model (SM) Higgs boson, we obtain limits on the anomalous couplings Hγγ and HZγ. We also perform a calculation at tree level of the decay widths as well as of the branching ratios for the reactions H → γγ and H → Zγ in the context of effective lagrangian for Higgs boson masses 115 ≤MH ≤ 130 GeV. We find that the decay widths and branching ratios from these reactions enhanced significantly due to the anomalous Hγγ and HZγ vertex, which would lead to measurable effects in Higgs signals at the LHC. Moreover, our results complement other studies on the channels H → γγ and H → Zγ.
Highlights
The Large Hadron Collider (LHC) of the European Center for Nuclear Research (CERN), has collected valuable data on the Higgs boson of the standard model of electroweak and strong interactions
We find that the decay widths and branching ratios from these reactions enhanced significantly due to the anomalous Hγγ and HZγ vertex, which would lead to measurable effects in Higgs signals at the LHC
In the Standard Model (SM) it is dominated by W gauge boson and top quark loops and the branching ratio for the decay modes H → γγ and H → Zγ reaches its maximumvalue of order 10–3 for an intermediate mass Higgs boson (115 ≤ MH ≤ 140 GeV) [4]
Summary
The Large Hadron Collider (LHC) of the European Center for Nuclear Research (CERN), has collected valuable data on the Higgs boson of the standard model of electroweak and strong interactions. Motivated by the recent result reported from LHC on the di-photon search from the Standard Model (SM) Higgs boson, we obtain limits on the anomalous couplings Hγγ and HZγ.
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