Phenomenology of Hidden Abelian Higgs Model at Hadron Colliders using Neural Networks and Monte Carlo Techniques (Gauge Sector $Z_{HAHM}$ & Scalar Sector H)

Abstract

The Hidden Abelian Higgs Model (HAHM) is an extension of the Standard Model based on the gauge group $G =SU(3)_{C} \times SU(2)_{L} \times U(1)_{Y} \times U(1)_{X}$ i.e. an extra $U(1)_{X}$ gauge group in addition to the SM gauge groups.In HAHM, an Abelian Hidden sector is coupled to the SM, and the resulting new Higgs boson H and new neutral gauge boson $Z_{HAHM}$ fields are allowed to mix with the corresponding SM fields. In this work, we search for the new neutral gauge boson $Z_{HAHM}$ and new Higgs boson in the context of the Hidden Abelian Higgs Model (HAHM) through the decay process $pp(\bar{p})\rightarrow H\rightarrow Z_{HAHM}Z_{HAHM}\rightarrow \textit{l}^{\pm}\textit{l}^{\mp}\textit{l}^{\pm}\textit{l}^{\mp},(\textit{l}=e,\mu)$ with 4 charged leptons in the final state in the mass range $200\leq Z_{HAHM} \leq 700$ GeV and the production and decay of new Higgs boson with 2 charged leptons in the final state of the process $pp(\bar{p})\rightarrow H\rightarrow\textit{l}^{\pm}\textit{l}^{\mp}jj ,(\textit{l}=e,\mu)$ with jets or final state of the proces $pp(\bar{p})\rightarrow H\rightarrow \textit{l}^{\pm}\textit{l}^{mp}\nu\bar{\nu},(l=e,\mu)$ with missing energy.We used Monte Carlo data produced from proton-proton collisions at the LHC CERN (CMS and ATLAS detectors) for different center of mass energies up to $\sqrt{s}= 14 TeV$