Ph.D Thesis | |

Ph.D Student | Aviad Roitgrund |
---|---|

Subject | The Left-Right Symmetric Model as an Extension of the Standard Model: Implications for the LHC |

Department | Department of Physics |

Supervisors | Professor Emeritus Eilam Gad |

Dr. Bar Shalom Shaouly | |

Full Thesis text |

We present an
implementation of the manifest left-right symmetric model (LRSM) in FeynRules.
The different aspects of the model are described alongside the corresponding
elements of the model file. We performed a wide range of validation tests for
the model, confronting it with known results in the literature. The model file
can be easily translated to matrix element generators such as MadGraph,
CalcHep, Sherpa, etc. The LRSM implementation presented in this work can serve
as a useful tool for the search for new physics at the LHC era. Indeed, as a
demonstration, we use the model implementation file to investigate the widely
studied lepton number violating (LNV) signal of like-sign dileptons and two
jets at the 14 TeV LHC, i.e., pp à
e^{±} e^{±} jj, and show that, for an integrated luminosity
of 300 fb^{-1}, the right-handed boson W?_{R} and the right-handed
electron neutrino N_{e} can be observed if their masses are smaller
than 5.2 TeV and 3.6 TeV, respectively. Apart from direct searches for the
LRSM, we also study its effects on precision electroweak data (PEWD)
observables such as *∆r*, *δρ* and the W-boson mass.
Indeed, we show that such indirect probes of the LRSM can be useful in
constraining its free parameter space. We also study the contribution of the
LRSM doubly-charged Higgs δ_{R}?^{±±} to the dilepton e^{±}
e^{±} jj signal and find that the maximal sensitivity to δ_{R}?^{±±}
is obtained for M (δ_{R}??^{±±} ) ≈ 1.3 TeV with a
luminosity of 300 fb^{-1.}.