Speaker
Description
After the discovery of a Higgs boson at the Large Hadron Collider (LHC) by the ATLAS and CMS experiments, a number of multi-lepton anomalies that represent a significant experimental evidence for a new physics have been identified. These anomalies are consistent with the decay of a heavy boson $H$ with a mass around $270 \,$GeV, into a Higgs like boson $S$ of a mass around $150 \,$GeV. The latter can be inferred from the invariant mass of final states with opposite sign leptons in these multi-lepton excesses. Motivated by this indirect evidence of a beyond the standard model of particle physics (BSM) scalar, we performed a combined fit of several direct searches for a Higgs-like by ATLAS and CMS, within the mass region of the $S$ scalar. The results of this combination are compared with predictions for a resonant pair production of the $S$ in a simplified model. A local significance of 5.2 $\sigma$ is achieved for a mass of $m_S = 152 \,$GeV. This therefore indicates a more stringent evidences for a new scalar at $152 \,$GeV, in multiple decay channels, such as, $Z\gamma$, $\gamma \gamma$, $WW$, $e\mu$ final states.
Level for award;(Hons, MSc, PhD, N/A)?
N/A
| Apply to be considered for a student ; award (Yes / No)? | no |
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