LHC, the Higgs particle and physics beyond the Standard Models - Simulation of an additional scalar particle a's decay

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Examensarbete för kandidatexamen
Bachelor Thesis
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2014
Författare
Djärv, Tor
Olsson, Andreas
Salér-Ramberg, Justin
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Sammanfattning
This thesis explores a possible addition of a scalar boson to the Standard Model. Apart from a quadratic coupling to the Higgs boson, it couples to the photon and the gluon. To fully be able to explore this new boson, it is necessary to get acquainted with some of the vast background theory in form of quantum field theory. This involves the most fundamental ideas of relativistic quantum mechanics, the Lagrangian formulation, cross section, decay rate, calculations of scatteringamplitude, Feynman diagrams, the Feynman rules and the Higgs mechanism. To analyse the particle, it was necessary to use computer aid in form of FeynRules, a package to Mathematica, for retrieve the Feynman rules for the particle, and MadGraph 5 for numerical calculations of decay rate and cross section. This was used to find limits to coupling constants with in the Lagrangian to concur with experimental findings.
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Ämne/nyckelord
Grundläggande vetenskaper, Fysik, Subatomär fysik, Basic Sciences, Physical Sciences, Subatomic Physics
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