Speaker
Description
The measurements related to the different properties of the newly discovered Higgs boson ($h$) at the LHC by ATLAS and CMS indicate that this 125 GeV boson is compatible with the Standard Model (SM). However, this does not exclude the existence of additional scalar bosons as long as their possible mixing with the SM Higgs is sufficiently small. In a recent phenomenological analysis, a search for narrow resonances with $S \to \gamma \gamma, Z \gamma$ along with leptons, di-jets, bottom quarks and missing
energy was reported. The global significance of the excess at $m_S = 151.5$GeV is $4 \sigma$, whereas a combination with the multi-lepton anomalies gives a significance larger than $5 \sigma$. Moreover, a recent CMS study in the W boson pair in proton-proton collisions presented an excess in dilepton channel associated with the $0, 1$ jet $ggH$ tagged categories. There it shows an excesses around 150 GeV. With this motivation, in this talk, we will compare two different models (namely, $2HDM+S$ and $2HDM+S+N$), containing two new hypothetical scalar bosons, H and S , which can explain these dilepton excesses
reasonably well. For $2HDM + S$ , we consider the neutral scalar H decays into a
lighter one S and the SM Higgs $h$ i.e. $H \to Sh/SS^*$. On the other hand, in $2HDM + S+N$, the dominant decay of the heavy higgs $H \to S(\to N N )S^* (\to N N )$ is considered to analyze the dilepton states to explain the excess.
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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