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 $pp(\bar{p})\to H\to Z_{HAHM}{Z}_{HAHM}\to {\text{l}}^{\pm }{\text{l}}^{\mp }{\text{l}}^{\pm }{\text{l}}^{\mp },(\text{l}=e,\mu )$ with 4 charged leptons in the final state in the mass range $200\le Z_{HAHM}\le 700$ GeV and the production and decay of new Higgs boson with 2 charged leptons in the final state of the process $pp(\bar{p})\to H\to {\text{l}}^{\pm }{\text{l}}^{\mp }jj,(\text{l}=e,\mu )$ with jets or final state of the proces $pp(\bar{p})\to H\to {\text{l}}^{\pm }{\text{l}}^{mp}\nu \bar{\nu },(l=e,\mu )$ 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 $\sqrt{s}=14TeV$